Уязвимость ядра операционной системы Linux, связанная с отсутствием защиты служебных данных, позволяющая нарушителю раскрыть защищаемую информацию

Уязвимость файла drivers/scsi/scsi_transport_iscsi.c ядра операционной системы Linux, позволяющая нарушителю подключаться к сокету iscsi NETLINK и отправлять команды ядру

Уязвимость функции show_transport_handle ядра операционной системы Linux, позволяющая нарушителю оказать воздействие на конфиденциальность, целостность и доступность защищаемой информации

Уязвимость функции show_transport_handle ядра операционной системы Linux, позволяющая нарушителю раскрыть защищаемую информацию или вызвать отказ в обслуживании

Уязвимость драйвера GPU Nouveau ядра операционной системы Linux, позволяющая нарушителю вызвать отказ в обслуживании

Уязвимость реализации функции show_transport_handle() ядра операционных систем Linux, позволяющая нарушителю получить несанкционированный доступ к защищаемой информации

Уязвимость подсистемы iSCSI ядра операционных систем Linux, позволяющая нарушителю вызвать отказ в обслуживании или повысить свои привилегии

Уязвимость подсистемы iSCSI ядра операционных систем Linux, позволяющая нарушителю нарушить конфиденциальность, целостность и доступность данных

Уязвимость функции rtw_wx_set_scan()  (drivers/staging/rtl8188eu/os_dep/ioctl_linux.c) ядра операционных систем Linux, позволяющая нарушителю вызвать отказ в обслуживании

Уязвимость драйвера Freescale Gianfar Ethernet ядра операционных систем Linux, позволяющая нарушителю вызвать отказ в обслуживании

Уязвимость реализации функции vhost_vdpa_config_put() ядра операционных систем Linux, позволяющая нарушителю вызвать отказ в обслуживании

Уязвимость реализации функции usbip_sockfd_store ядра операционных систем Linux, позволяющая нарушителю вызвать отказ в обслуживании

Уязвимость реализации механизма проверки BPF ядра операционных систем Linux, позволяющая нарушителю получить несанкционированный доступ к защищаемой информации или выполнить произвольный код

Уязвимость файла fs/io_uring.c ядра операционной системы Linux, позволяющая нарушителю вызвать отказ в обслуживании

Уязвимость файла sound/soc/qcom/sdm845.c ядра операционной системы Linux, позволяющая нарушителю получить несанкционированный доступ к защищаемой информации

Уязвимость файла kernel/bpf/verifier.c ядра операционной системы Linux, позволяющая нарушителю получить получить несанкционированный доступ к защищаемой информации

Уязвимость файла kernel/bpf/verifier.c ядра операционной системы Linux, позволяющая нарушителю получить получить несанкционированный доступ к защищаемой информации

Уязвимость файла fs/fuse/fuse_i.h ядра операционной системы Linux, позволяющая нарушителю вызвать отказ в обслуживании

Уязвимость файла get_old_root in fs/btrfs/ctree.c ядра операционной системы Linux, позволяющая нарушителю вызвать отказ в обслуживании

Уязвимость файла drivers/pci/hotplug/rpadlpar_sysfs.c ядра операционной системы Linux, позволяющая нарушителю оказать воздействие на конфиденциальность, целостность и доступность защищаемой информации

Уязвимость функции synic_get (arch/x86/kvm/hyperv.c) ядра операционных систем Linux, позволяющая нарушителю вызвать отказ в обслуживании

Уязвимость реализации функции video_usercopy (drivers/media/v4l2-core/v4l2-ioctl.c) ядра операционных систем Linux, позволяющая нарушителю вызвать отказ в обслуживании

Уязвимость подсистемы netfilter ядра операционной системы Linux, позволяющая нарушителю вызвать отказ в обслуживании

Уязвимость функции rtr_recvmsg ядра операционной системы Linux, позволяющая нарушителю получить конфиденциальную информацию

Уязвимость подсистемы BPF функции map_create или check_btf_info ядра операционной системы Linux, позволяющая нарушителю вызвать аварийное завершение работы приложения

Уязвимость драйвера пользовательского режима (UMD) ядра операционной системы Linux, позволяющая нарушителю вызвать отказ в обслуживании

Уязвимость функции tipc_nl_retrieve_key ядра операционной системы Linux, позволяющая нарушителю вызвать отказ в обслуживании

Уязвимость компонента BPF JIT (arch/x86/net/bpf_jit_comp.c и arch/x86/net/bpf_jit_comp32.c.) ядра операционной системы Linux, позволяющая нарушителю выполнить произвольный код

Уязвимость компонента kernel/bpf/verifier.c ядра операционной системы Linux, позволяющая нарушителю получить несанкционированный доступ к защищаемой информации

Уязвимость компонента drivers/block/xen-blkback/blkback.c ядра операционных систем Linux, позволяющая нарушителю оказать воздействие на конфиденциальность, целостность и доступность защищаемой информации

Уязвимость компонентов arch/*/xen/p2m.c, drivers/xen/gntdev.c ядра операционных систем Linux, позволяющая нарушителю вызвать отказ в обслуживании

Уязвимость драйверов drm_xen_front ядра операционной системы Linux, позволяющая нарушителю выполнить произвольный код

Уязвимость набора стандартов связи для коммуникации IEEE 802.11 операционной системы Windows, позволяющая нарушителю внедрить произвольные сетевые пакеты

Уязвимость драйверов drivers/block/xen-blkback/blkback.c, drivers/xen/xen-scsiback.c ядра операционной системы Linux, позволяющая нарушителю вызвать отказ в обслуживании

Уязвимость реализации алгоритмов WPA, WPA2 и WPA3 набора стандартов связи для коммуникации IEEE 802.11, позволяющая нарушителю оказать воздействие на целостность защищаемой информации

Уязвимость реализации алгоритмов WEP, WPA, WPA2 и WPA3 набора стандартов связи для коммуникации IEEE 802.11, позволяющая нарушителю внедрить произвольные сетевые пакеты и/или оказать воздействие на целостность защищаемой информации

Уязвимость реализации алгоритмов WEP, WPA, WPA2 и WPA3 ядра операционной системы Linux, позволяющая нарушителю оказать воздействие на целостность защищаемой информации

Уязвимость функции cipso_v4_genopt (net/ipv4/cipso_ipv4.c) ядра операционной системы Linux, позволяющая нарушителю выполнить произвольный код

Уязвимость функции intel_pmu_drain_pebs_nhm (arch/x86/events/intel/ds.c) ядра операционной системы Linux , связанная с неконтролируемым расходом ресурсов, позволяющая нарушителю вызвать отказ в обслуживании

Уязвимость компонента XSA-365 операционной системы Linux, связанная с неверной инициализацией данных, позволяющая нарушителю вызвать отказ в обслуживании

Уязвимость функции fastrpc_internal_invoke (drivers/misc/fastrpc.c) ядра операционной системы Linux, позволяющая нарушителю выполнить произвольную команду управления

Уязвимость компонента arch/x86/kvm/svm/nested.c операционной системы Linux , связанная с использованием памяти после её освобождения, позволяющая нарушителю повысить свои привилегии

Уязвимость функций copy_page_to_iter_pipe и push_pipe ядра операционной системы Linux, позволяющая нарушителю перезаписать содержимое страничного кэша произвольных файлов

Уязвимость функции llcp_sock_connect() операционной системы Linux, позволяющая нарушителю повысить свои привилегии

Уязвимость функции llcp_sock_bind() протокола nfc ядра операционной системы Linux, позволяющая нарушителю получить доступ к конфиденциальным данным, нарушить их целостность, а также вызвать отказ в обслуживании

Уязвимость ioctl cmd PIO_FONT ядра операционной системы Linux, позволяющая нарушителю выполнить произвольный код с повышенными привилегиями

Уязвимость функции __do_proc_dointvec ядра операционной системы Linux, позволяющая нарушителю вызвать отказ в обслуживании или повысить свои привилегии

Уязвимость компонента fs/io_uring.c ядра операционной системы Linux, позволяющая нарушителю вызвать отказ в обслуживании

Уязвимость функции sl_tx_timeout() в модуле drivers/net/slip.c драйвера SLIP ядра операционной системы Linux, позволяющая нарушителю вызвать отказ в обслуживании

Уязвимость модуля io_uring.c ядра операционной системы Linux, позволяющая нарушителю получить несанкционированный доступ к защищаемой информации

Уязвимость реализации протокола Upper Level Protocol (ULP) ядра операционной системы Linux, позволяющая нарушителю повысить свои привилегии, выполнить произвольный код или вызвать отказ в обслуживании

Уязвимость функции _copy_from_user() в модуле lib/usercopy.c ядра операционной системы Linux, позволяющая нарушителю раскрыть защищаемую информацию

Уязвимость функции inode_init_owner() в модуле fs/inode.c файловой системы XFS ядра операционной системы Linux, позволяющая нарушителю повысить свои привилегии и получить доступ к защищаемой информации, а так же вызвать отказ в обслуживании

Overlayfs did not properly perform permission checking when copying up files in an overlayfs and could be exploited from within a user namespace, if, for example, unprivileged user namespaces were allowed. It was possible to have a file not readable by an unprivileged user to be copied to a mountpoint controlled by the user, like a removable device. This was introduced in kernel version 4.19 by commit d1d04ef ("ovl: stack file ops"). This was fixed in kernel version 5.8 by commits 56230d9 ("ovl: verify permissions in ovl_path_open()"), 48bd024 ("ovl: switch to mounter creds in readdir") and 05acefb ("ovl: check permission to open real file"). Additionally, commits 130fdbc ("ovl: pass correct flags for opening real directory") and 292f902 ("ovl: call secutiry hook in ovl_real_ioctl()") in kernel 5.8 might also be desired or necessary. These additional commits introduced a regression in overlay mounts within user namespaces which prevented access to files with ownership outside of the user namespace. This regression was mitigated by subsequent commit b6650da ("ovl: do not fail because of O_NOATIMEi") in kernel 5.11.

The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that received fragments be cleared from memory after (re)connecting to a network. Under the right circumstances, when another device sends fragmented frames encrypted using WEP, CCMP, or GCMP, this can be abused to inject arbitrary network packets and/or exfiltrate user data.

The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that all fragments of a frame are encrypted under the same key. An adversary can abuse this to decrypt selected fragments when another device sends fragmented frames and the WEP, CCMP, or GCMP encryption key is periodically renewed.

The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that the A-MSDU flag in the plaintext QoS header field is authenticated. Against devices that support receiving non-SSP A-MSDU frames (which is mandatory as part of 802.11n), an adversary can abuse this to inject arbitrary network packets.

A NULL pointer dereference flaw was found in the Linux kernel's GPU Nouveau driver functionality in versions prior to 5.12-rc1 in the way the user calls ioctl DRM_IOCTL_NOUVEAU_CHANNEL_ALLOC. This flaw allows a local user to crash the system.

A vulnerability was found in Linux Kernel where refcount leak in llcp_sock_bind() causing use-after-free which might lead to privilege escalations.

A vulnerability was found in Linux Kernel, where a refcount leak in llcp_sock_connect() causing use-after-free which might lead to privilege escalations.

An issue was discovered in the Linux kernel 5.8.9. The WEP, WPA, WPA2, and WPA3 implementations reassemble fragments even though some of them were sent in plaintext. This vulnerability can be abused to inject packets and/or exfiltrate selected fragments when another device sends fragmented frames and the WEP, CCMP, or GCMP data-confidentiality protocol is used.

An issue was discovered in the Linux kernel before 5.11.8. kernel/bpf/verifier.c performs undesirable out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory, aka CID-f232326f6966. This affects pointer types that do not define a ptr_limit.

An issue was discovered in the Linux kernel before 5.11.8. kernel/bpf/verifier.c has an off-by-one error (with a resultant integer underflow) affecting out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory, aka CID-10d2bb2e6b1d.

A NULL pointer dereference flaw in Linux kernel versions prior to 5.11 may be seen if sco_sock_getsockopt function in net/bluetooth/sco.c do not have a sanity check for a socket connection, when using BT_SNDMTU/BT_RCVMTU for SCO sockets. This could allow a local attacker with a special user privilege to crash the system (DOS) or leak kernel internal information.

An issue was discovered in the Linux kernel 3.11 through 5.10.16, as used by Xen. To service requests to the PV backend, the driver maps grant references provided by the frontend. In this process, errors may be encountered. In one case, an error encountered earlier might be discarded by later processing, resulting in the caller assuming successful mapping, and hence subsequent operations trying to access space that wasn't mapped. In another case, internal state would be insufficiently updated, preventing safe recovery from the error. This affects drivers/block/xen-blkback/blkback.c.

An issue was discovered in the Linux kernel 2.6.39 through 5.10.16, as used in Xen. Block, net, and SCSI backends consider certain errors a plain bug, deliberately causing a kernel crash. For errors potentially being at least under the influence of guests (such as out of memory conditions), it isn't correct to assume a plain bug. Memory allocations potentially causing such crashes occur only when Linux is running in PV mode, though. This affects drivers/block/xen-blkback/blkback.c and drivers/xen/xen-scsiback.c.

An issue was discovered in the Linux kernel 3.2 through 5.10.16, as used by Xen. Grant mapping operations often occur in batch hypercalls, where a number of operations are done in a single hypercall, the success or failure of each one is reported to the backend driver, and the backend driver then loops over the results, performing follow-up actions based on the success or failure of each operation. Unfortunately, when running in PV mode, the Linux backend drivers mishandle this: Some errors are ignored, effectively implying their success from the success of related batch elements. In other cases, errors resulting from one batch element lead to further batch elements not being inspected, and hence successful ones to not be possible to properly unmap upon error recovery. Only systems with Linux backends running in PV mode are vulnerable. Linux backends run in HVM / PVH modes are not vulnerable. This affects arch/*/xen/p2m.c and drivers/xen/gntdev.c.

An issue was discovered in the Linux kernel 4.18 through 5.10.16, as used by Xen. The backend allocation (aka be-alloc) mode of the drm_xen_front drivers was not meant to be a supported configuration, but this wasn't stated accordingly in its support status entry.

An issue was discovered in the Linux kernel through 5.11.3. A kernel pointer leak can be used to determine the address of the iscsi_transport structure. When an iSCSI transport is registered with the iSCSI subsystem, the transport's handle is available to unprivileged users via the sysfs file system, at /sys/class/iscsi_transport/$TRANSPORT_NAME/handle. When read, the show_transport_handle function (in drivers/scsi/scsi_transport_iscsi.c) is called, which leaks the handle. This handle is actually the pointer to an iscsi_transport struct in the kernel module's global variables.

An issue was discovered in the Linux kernel through 5.11.3. drivers/scsi/scsi_transport_iscsi.c is adversely affected by the ability of an unprivileged user to craft Netlink messages.

An issue was discovered in the Linux kernel through 5.11.3. Certain iSCSI data structures do not have appropriate length constraints or checks, and can exceed the PAGE_SIZE value. An unprivileged user can send a Netlink message that is associated with iSCSI, and has a length up to the maximum length of a Netlink message.

An issue was discovered in the Linux kernel through 5.11.6. fastrpc_internal_invoke in drivers/misc/fastrpc.c does not prevent user applications from sending kernel RPC messages, aka CID-20c40794eb85. This is a related issue to CVE-2019-2308.

rtw_wx_set_scan in drivers/staging/rtl8188eu/os_dep/ioctl_linux.c in the Linux kernel through 5.11.6 allows writing beyond the end of the ->ssid[] array. NOTE: from the perspective of kernel.org releases, CVE IDs are not normally used for drivers/staging/* (unfinished work); however, system integrators may have situations in which a drivers/staging issue is relevant to their own customer base.

The fix for XSA-365 includes initialization of pointers such that subsequent cleanup code wouldn't use uninitialized or stale values. This initialization went too far and may under certain conditions also overwrite pointers which are in need of cleaning up. The lack of cleanup would result in leaking persistent grants. The leak in turn would prevent fully cleaning up after a respective guest has died, leaving around zombie domains. All Linux versions having the fix for XSA-365 applied are vulnerable. XSA-365 was classified to affect versions back to at least 3.11.

An issue was discovered in fs/fuse/fuse_i.h in the Linux kernel before 5.11.8. A "stall on CPU" can occur because a retry loop continually finds the same bad inode, aka CID-775c5033a0d1.

An issue was discovered in fs/io_uring.c in the Linux kernel through 5.11.8. It allows attackers to cause a denial of service (deadlock) because exit may be waiting to park a SQPOLL thread, but concurrently that SQPOLL thread is waiting for a signal to start, aka CID-3ebba796fa25.

An issue was discovered in the Linux kernel through 5.11.8. The sound/soc/qcom/sdm845.c soundwire device driver has a buffer overflow when an unexpected port ID number is encountered, aka CID-1c668e1c0a0f. (This has been fixed in 5.12-rc4.)

A race condition was discovered in get_old_root in fs/btrfs/ctree.c in the Linux kernel through 5.11.8. It allows attackers to cause a denial of service (BUG) because of a lack of locking on an extent buffer before a cloning operation, aka CID-dbcc7d57bffc.

In intel_pmu_drain_pebs_nhm in arch/x86/events/intel/ds.c in the Linux kernel through 5.11.8 on some Haswell CPUs, userspace applications (such as perf-fuzzer) can cause a system crash because the PEBS status in a PEBS record is mishandled, aka CID-d88d05a9e0b6.

In drivers/pci/hotplug/rpadlpar_sysfs.c in the Linux kernel through 5.11.8, the RPA PCI Hotplug driver has a user-tolerable buffer overflow when writing a new device name to the driver from userspace, allowing userspace to write data to the kernel stack frame directly. This occurs because add_slot_store and remove_slot_store mishandle drc_name '\0' termination, aka CID-cc7a0bb058b8.

BPF JIT compilers in the Linux kernel through 5.11.12 have incorrect computation of branch displacements, allowing them to execute arbitrary code within the kernel context. This affects arch/x86/net/bpf_jit_comp.c and arch/x86/net/bpf_jit_comp32.c.

An issue was discovered in the Linux kernel through 5.11.x. kernel/bpf/verifier.c performs undesirable out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory. Specifically, for sequences of pointer arithmetic operations, the pointer modification performed by the first operation is not correctly accounted for when restricting subsequent operations.

An issue was discovered in the Linux kernel through 5.11.10. drivers/net/ethernet/freescale/gianfar.c in the Freescale Gianfar Ethernet driver allows attackers to cause a system crash because a negative fragment size is calculated in situations involving an rx queue overrun when jumbo packets are used and NAPI is enabled, aka CID-d8861bab48b6.

An issue was discovered in the Linux kernel before 5.11.7. usbip_sockfd_store in drivers/usb/usbip/stub_dev.c allows attackers to cause a denial of service (GPF) because the stub-up sequence has race conditions during an update of the local and shared status, aka CID-9380afd6df70.

An issue was discovered in the Linux kernel before 5.11.9. drivers/vhost/vdpa.c has a use-after-free because v->config_ctx has an invalid value upon re-opening a character device, aka CID-f6bbf0010ba0.

An issue was discovered in the Linux kernel before 5.11.11. tipc_nl_retrieve_key in net/tipc/node.c does not properly validate certain data sizes, aka CID-0217ed2848e8.

An issue was discovered in the Linux kernel before 5.11.11. qrtr_recvmsg in net/qrtr/qrtr.c allows attackers to obtain sensitive information from kernel memory because of a partially uninitialized data structure, aka CID-50535249f624.

An issue was discovered in the Linux kernel before 5.11.11. The BPF subsystem does not properly consider that resolved_ids and resolved_sizes are intentionally uninitialized in the vmlinux BPF Type Format (BTF), which can cause a system crash upon an unexpected access attempt (in map_create in kernel/bpf/syscall.c or check_btf_info in kernel/bpf/verifier.c), aka CID-350a5c4dd245.

An issue was discovered in the Linux kernel before 5.11.11. The user mode driver (UMD) has a copy_process() memory leak, related to a lack of cleanup steps in kernel/usermode_driver.c and kernel/bpf/preload/bpf_preload_kern.c, aka CID-f60a85cad677.

An issue was discovered in the Linux kernel before 5.11.11. The netfilter subsystem allows attackers to cause a denial of service (panic) because net/netfilter/x_tables.c and include/linux/netfilter/x_tables.h lack a full memory barrier upon the assignment of a new table value, aka CID-175e476b8cdf.

arch/x86/kvm/svm/nested.c in the Linux kernel before 5.11.12 has a use-after-free in which an AMD KVM guest can bypass access control on host OS MSRs when there are nested guests, aka CID-a58d9166a756. This occurs because of a TOCTOU race condition associated with a VMCB12 double fetch in nested_svm_vmrun.

An issue was discovered in the Linux kernel before 5.11.3 when a webcam device exists. video_usercopy in drivers/media/v4l2-core/v4l2-ioctl.c has a memory leak for large arguments, aka CID-fb18802a338b.

An issue was discovered in the Linux kernel through 5.11.11. synic_get in arch/x86/kvm/hyperv.c has a NULL pointer dereference for certain accesses to the SynIC Hyper-V context, aka CID-919f4ebc5987.

The Linux kernel before 5.11.14 has a use-after-free in cipso_v4_genopt in net/ipv4/cipso_ipv4.c because the CIPSO and CALIPSO refcounting for the DOI definitions is mishandled, aka CID-ad5d07f4a9cd. This leads to writing an arbitrary value.

When setting font with malicous data by ioctl cmd PIO_FONT,kernel will write memory out of bounds.

The bpf verifier in the Linux kernel did not properly handle mod32 destination register truncation when the source register was known to be 0. A local attacker with the ability to load bpf programs could use this gain out-of-bounds reads in kernel memory leading to information disclosure (kernel memory), and possibly out-of-bounds writes that could potentially lead to code execution. This issue was addressed in the upstream kernel in commit 9b00f1b78809 ("bpf: Fix truncation handling for mod32 dst reg wrt zero") and in Linux stable kernels 5.11.2, 5.10.19, and 5.4.101.

A vulnerability was found in the fs/inode.c:inode_init_owner() function logic of the LInux kernel that allows local users to create files for the XFS file-system with an unintended group ownership and with group execution and SGID permission bits set, in a scenario where a directory is SGID and belongs to a certain group and is writable by a user who is not a member of this group. This can lead to excessive permissions granted in case when they should not. This vulnerability is similar to the previous CVE-2018-13405 and adds the missed fix for the XFS.

A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe and push_pipe functions in the Linux kernel and could thus contain stale values. An unprivileged local user could use this flaw to write to pages in the page cache backed by read only files and as such escalate their privileges on the system.

A flaw was found in the Linux kernel. A NULL pointer dereference may occur while a slip driver is in progress to detach in sl_tx_timeout in drivers/net/slip/slip.c. This issue could allow an attacker to crash the system or leak internal kernel information.

A stack overflow flaw was found in the Linux kernel's SYSCTL subsystem in how a user changes certain kernel parameters and variables. This flaw allows a local user to crash or potentially escalate their privileges on the system.

An issue was discovered in the Linux kernel 5.10.x before 5.10.155. A use-after-free in io_sqpoll_wait_sq in fs/io_uring.c allows an attacker to crash the kernel, resulting in denial of service. finish_wait can be skipped. An attack can occur in some situations by forking a process and then quickly terminating it. NOTE: later kernel versions, such as the 5.15 longterm series, substantially changed the implementation of io_sqpoll_wait_sq.

Copy_from_user on 64-bit versions of the Linux kernel does not implement the __uaccess_begin_nospec allowing a user to bypass the "access_ok" check and pass a kernel pointer to copy_from_user(). This would allow an attacker to leak information. We recommend upgrading beyond commit 74e19ef0ff8061ef55957c3abd71614ef0f42f47

There is a use-after-free vulnerability in the Linux Kernel which can be exploited to achieve local privilege escalation. To reach the vulnerability kernel configuration flag CONFIG_TLS or CONFIG_XFRM_ESPINTCP has to be configured, but the operation does not require any privilege.

There is a use-after-free bug of icsk_ulp_data of a struct inet_connection_sock.

When CONFIG_TLS is enabled, user can install a tls context (struct tls_context) on a connected tcp socket. The context is not cleared if this socket is disconnected and reused as a listener. If a new socket is created from the listener, the context is inherited and vulnerable.

The setsockopt TCP_ULP operation does not require any privilege.

We recommend upgrading past commit 2c02d41d71f90a5168391b6a5f2954112ba2307c

Due to a vulnerability in the io_uring subsystem, it is possible to leak kernel memory information to the user process. timens_install calls current_is_single_threaded to determine if the current process is single-threaded, but this call does not consider io_uring's io_worker threads, thus it is possible to insert a time namespace's vvar page to process's memory space via a page fault. When this time namespace is destroyed, the vvar page is also freed, but not removed from the process' memory, and a next page allocated by the kernel will be still available from the user-space process and can leak memory contents via this (read-only) use-after-free vulnerability. We recommend upgrading past version 5.10.161 or commit  788d0824269bef539fe31a785b1517882eafed93 https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/io_uring