CVE-2026-99245

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    CVE-2026-99245

    Published: 3 Nov 2026Last Modified: 5 Nov 2026

    Summary: KEYS: Fix key_reject_and_link() race with keyring restriction

    Details: In the Linux kernel, the following vulnerability has been resolved: KEYS: Fix key_reject_and_link() race with keyring restriction The restrict_link check in key_reject_and_link() is done before taking the keyring semaphore, racing with a concurrent keyring_restrict() that installs the restriction while holding the semaphore in write mode. Move the check to after __key_link_lock(), so it is done under the semaphore, matching the pattern used in __key_create_or_update().

    References: https://git.kernel.org/stable/c/01835d3a3709be508ae5209f806640336c48e395, https://git.kernel.org/stable/c/0b157166e612b70f98a332b6c7be7eac6f8e9593, https://git.kernel.org/stable/c/19dfc37c9deefa69dc805d01d35d1f2fd7902e33, https://git.kernel.org/stable/c/23a9163cc40b4996ba1e20533b1210a1a0bee416, https://git.kernel.org/stable/c/2c3d907dd15f4e30d4c35b9f7a7a5078de6a1b1f, https://git.kernel.org/stable/c/5787887eba0f0979a8c86d03a8e891395d5c24ad, https://git.kernel.org/stable/c/6fc0c818b1cac66003e937c8a0d3bfb23fd3f130, https://git.kernel.org/stable/c/72f367417a6aee56821d0b0114cfd2b080008b63, https://git.kernel.org/stable/c/c7956ec99ad0e173720d95de9fa788bb077809f2, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/99xxx/CVE-2026-99245.json, https://nvd.nist.gov/vuln/detail/CVE-2026-99245, https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 5ac7eace2d00eab5ae0e9fdee63e38aee6001f7c
    Fixed -c7956ec99ad0e173720d95de9fa788bb077809f2

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-99245 | CVE-DB