CVE-2025-40328
smb: client: fix potential UAF in smb2_close_cached_fid()
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Dec 9, 2025 |
| Last Updated | May 11, 2026 |
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Affected Versions
Linux / Linux
ebe98f1447bbccf8228335c62d86af02a0ed23f7 < cb52d9c86d70298de0ab7c7953653898cbc0efd6 ebe98f1447bbccf8228335c62d86af02a0ed23f7 < 065bd62412271a2d734810dd50336cae88c54427 ebe98f1447bbccf8228335c62d86af02a0ed23f7 < bdb596ceb4b7c3f28786a33840263728217fbcf5 ebe98f1447bbccf8228335c62d86af02a0ed23f7 < 734e99623c5b65bf2c03e35978a0b980ebc3c2f8
Linux / Linux
6.1
References
git.kernel.org: https://git.kernel.org/stable/c/cb52d9c86d70298de0ab7c7953653898cbc0efd6 git.kernel.org: https://git.kernel.org/stable/c/065bd62412271a2d734810dd50336cae88c54427 git.kernel.org: https://git.kernel.org/stable/c/bdb596ceb4b7c3f28786a33840263728217fbcf5 git.kernel.org: https://git.kernel.org/stable/c/734e99623c5b65bf2c03e35978a0b980ebc3c2f8