CVE-2026-99245

Description

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/19dfc37c9deefa69dc805d01d35d1f2fd7902e33
• https://git.kernel.org/stable/c/23a9163cc40b4996ba1e20533b1210a1a0bee416
• https://git.kernel.org/stable/c/2c3d907dd15f4e30d4c35b9f7a7a5078de6a1b1f
• https://git.kernel.org/stable/c/5787887eba0f0979a8c86d03a8e891395d5c24ad