CVE-2024-42250

Summary

In the Linux kernel, the following vulnerability has been resolved: cachefiles: add missing lock protection when polling Add missing lock protection in poll routine when iterating xarray, otherwise: Even with RCU read lock held, only the slot of the radix tree is ensured to be pinned there, while the data structure (e.g. struct cachefiles_req) stored in the slot has no such guarantee. The poll routine will iterate the radix tree and dereference cachefiles_req accordingly. Thus RCU read lock is not adequate in this case and spinlock is needed here.

Impact & exploitability

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products we track (1)

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Official patch: https://git.kernel.org/stable/c/6bb6bd3dd6f382dfd36220d4b210a0c77c066651 ↗

Additional information

• NVD record
• https://git.kernel.org/stable/c/6bb6bd3dd6f382dfd36220d4b210a0c77c066651Patch
• https://git.kernel.org/stable/c/8eadcab7f3dd809edbe5ae20533ff843dfea3a07Patch
• https://git.kernel.org/stable/c/97cfd5e20ddc2e33e16ce369626ce76c9a475fd7Patch
• https://git.kernel.org/stable/c/cf5bb09e742a9cf6349127e868329a8f69b7a014Patch
• https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html