Description
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: fix null pointer dereference in alloc_preauth_hash()
The Client send malformed smb2 negotiate request. ksmbd return error response. Subsequently, the client can send smb2 session setup even thought conn->preauth_info is not allocated. This patch add KSMBD_SESS_NEED_SETUP status of connection to ignore session setup request if smb2 negotiate phase is not complete.
Metrics
CVSS 3.1 7.5/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 0626e6641f6b467447c81dd7678a69c66f7746cf, < 2d3461d6ae74ebdcd4d65128c855198649bcadcd; >= 0626e6641f6b467447c81dd7678a69c66f7746cf, < cce57cd8c5dead24127cf2308fdd60fcad2d6ba6; >= 0626e6641f6b467447c81dd7678a69c66f7746cf, < ca8bed31edf728a662ef9d6f39f50e7a7dc2b5ad; >= 0626e6641f6b467447c81dd7678a69c66f7746cf, < 8f216b33a5e1b3489c073b1ea1b3d7cb63c8dc4d; >= 0626e6641f6b467447c81dd7678a69c66f7746cf, < b8eb243e670ecf30e91524dd12f7260dac07d335; >= 0626e6641f6b467447c81dd7678a69c66f7746cf, < c8b5b7c5da7d0c31c9b7190b4a7bba5281fc4780 |
| Linux | Linux | 5.15 |
References
- https://git.kernel.org/stable/c/2d3461d6ae74ebdcd4d65128c855198649bcadcd
- https://git.kernel.org/stable/c/8f216b33a5e1b3489c073b1ea1b3d7cb63c8dc4dPatch
- https://git.kernel.org/stable/c/b8eb243e670ecf30e91524dd12f7260dac07d335Patch
- https://git.kernel.org/stable/c/c8b5b7c5da7d0c31c9b7190b4a7bba5281fc4780Patch
- https://git.kernel.org/stable/c/ca8bed31edf728a662ef9d6f39f50e7a7dc2b5adPatch
- https://git.kernel.org/stable/c/cce57cd8c5dead24127cf2308fdd60fcad2d6ba6Patch
- https://www.zerodayinitiative.com/advisories/ZDI-25-310/Third Party Advisory
Timeline
- Published
- Apr 16, 2025
- Last modified
- Oct 30, 2026
- NVD status
- Modified