Vulnerability CVE-2026-42011: Information
Description
A flaw was found in gnutls. This vulnerability occurs because permitted name constraints were incorrectly ignored when previous Certificate Authorities (CAs) only had excluded name constraints. A remote attacker could exploit this to bypass critical name constraint checks during certificate validation. This bypass could lead to the acceptance of invalid certificates, potentially enabling spoofing or man-in-the-middle attacks against affected systems.
Severity: HIGH (7.4)
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Fixed packages
Package name | Branch | Fixed in version | Version from repository | Errata ID | Task # | State |
|---|---|---|---|---|---|---|
| gnutls30 | sisyphus | 3.8.13-alt1 | 3.8.13-alt1 | ALT-PU-2026-7123-1 | 417120 | Fixed |
| gnutls30 | p11 | 3.8.13-alt1 | 3.8.13-alt1 | ALT-PU-2026-7127-2 | 417121 | Fixed |
| gnutls30 | p10 | 3.6.16-alt11 | 3.6.16-alt10 | ALT-PU-2026-7344-1 | 417556 | Testing |
| gnutls30 | c10f2 | 3.6.16-alt11 | 3.6.16-alt10 | ALT-PU-2026-7348-1 | 417557 | Testing |