CVEvulnerability
CVE-2025-40328
8.8 HIGH
Official page ↗
- Status
- Deferred
- Published
- 2025-12-09
- Last modified
- 2026-10-15
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
- 8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Description
In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix potential UAF in smb2_close_cached_fid()
find_or_create_cached_dir() could grab a new reference after kref_put()
had seen the refcount drop to zero but before cfid_list_lock is acquired
in smb2_close_cached_fid(), leading to use-after-free.
Switch to kref_put_lock() so cfid_release() is called with
cfid_list_lock held, closing that gap.
References
- https://git.kernel.org/stable/c/065bd62412271a2d734810dd50336cae88c54427 git.kernel.org
- https://git.kernel.org/stable/c/734e99623c5b65bf2c03e35978a0b980ebc3c2f8 git.kernel.org
- https://git.kernel.org/stable/c/bdb596ceb4b7c3f28786a33840263728217fbcf5 git.kernel.org
- https://git.kernel.org/stable/c/cb52d9c86d70298de0ab7c7953653898cbc0efd6 git.kernel.org