CVE-2023-3866
ksmbd: validate session id and tree id in the compound request
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate session id and tree id in the compound request This patch validate session id and tree id in compound request. If first operation in the compound is SMB2 ECHO request, ksmbd bypass session and tree validation. So work->sess and work->tcon could be NULL. If secound request in the compound access work->sess or tcon, It cause NULL pointer dereferecing error.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Aug 16, 2025 |
| Last Updated | May 11, 2026 |
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Affected Versions
Linux / Linux
0626e6641f6b467447c81dd7678a69c66f7746cf < eb947403518ea3d93f6d89264bb1f5416bb0c7d0 0626e6641f6b467447c81dd7678a69c66f7746cf < 854156d12caa9d36de1cf5f084591c7686cc8a9d 0626e6641f6b467447c81dd7678a69c66f7746cf < d1066c1b3663401cd23c0d6e60cdae750ce00c0f 0626e6641f6b467447c81dd7678a69c66f7746cf < 5005bcb4219156f1bf7587b185080ec1da08518e
Linux / Linux
5.15
References
git.kernel.org: https://git.kernel.org/stable/c/eb947403518ea3d93f6d89264bb1f5416bb0c7d0 git.kernel.org: https://git.kernel.org/stable/c/854156d12caa9d36de1cf5f084591c7686cc8a9d git.kernel.org: https://git.kernel.org/stable/c/d1066c1b3663401cd23c0d6e60cdae750ce00c0f git.kernel.org: https://git.kernel.org/stable/c/5005bcb4219156f1bf7587b185080ec1da08518e