CVE-2025-40328
highIn the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential UAF in smb2_close_cached_fid() find_or_create_cached_dir() cou…
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.
CVSS
8.8
8.8 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Severity source: NVD CVSS v3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
Timeline (UTC)
Published: 2025-12-09 16:17
Modified: 2026-10-30 13:18
NVD status: Deferred
Last synced 1 day ago
Verified against the source API 2026-11-03 07:34 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
Not reported by the source (unknown — not "none").
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://git.kernel.org/stable/c/065bd62412271a2d734810dd50336cae88c54427 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- https://git.kernel.org/stable/c/734e99623c5b65bf2c03e35978a0b980ebc3c2f8 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- https://git.kernel.org/stable/c/bb3355ce9dcaba1b4a766f98b2ad373cab6cd626 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- https://git.kernel.org/stable/c/bdb596ceb4b7c3f28786a33840263728217fbcf5 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- https://git.kernel.org/stable/c/cb52d9c86d70298de0ab7c7953653898cbc0efd6 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Data sources
NVD CVE API 2.0 — fetched 2026-11-03 07:34 UTC · record ↗