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.
Affected products
linux: linux kernel
References7
- git.kernel.org/stable/c/8f216b33a5e1b3489c073b1ea1b3d7cb63c8dc4d Patch
- git.kernel.org/stable/c/b8eb243e670ecf30e91524dd12f7260dac07d335 Patch
- git.kernel.org/stable/c/c8b5b7c5da7d0c31c9b7190b4a7bba5281fc4780 Patch
- git.kernel.org/stable/c/ca8bed31edf728a662ef9d6f39f50e7a7dc2b5ad Patch
- git.kernel.org/stable/c/cce57cd8c5dead24127cf2308fdd60fcad2d6ba6 Patch
- git.kernel.org/stable/c/2d3461d6ae74ebdcd4d65128c855198649bcadcd
- www.zerodayinitiative.com/advisories/ZDI-25-310/ Third Party Advisory
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 69% percentile: 99 · as of 7 November 2026
- CWE
- CWE-476
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