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.
Fix
Patch, vendor advisory and mitigation references on NVD 5
- https://git.kernel.org/stable/c/8f216b33a5e1b3489c073b1ea1b3d7cb63c8dc4d Patch
- https://git.kernel.org/stable/c/b8eb243e670ecf30e91524dd12f7260dac07d335 Patch
- https://git.kernel.org/stable/c/c8b5b7c5da7d0c31c9b7190b4a7bba5281fc4780 Patch
- https://git.kernel.org/stable/c/ca8bed31edf728a662ef9d6f39f50e7a7dc2b5ad Patch
- https://git.kernel.org/stable/c/cce57cd8c5dead24127cf2308fdd60fcad2d6ba6 Patch
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 7.5 · linuxNVD modified 2026-10-08 00:46
Affected (CPE criteria) 1
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
References 6
- https://git.kernel.org/stable/c/8f216b33a5e1b3489c073b1ea1b3d7cb63c8dc4d Patch
- https://git.kernel.org/stable/c/b8eb243e670ecf30e91524dd12f7260dac07d335 Patch
- https://git.kernel.org/stable/c/c8b5b7c5da7d0c31c9b7190b4a7bba5281fc4780 Patch
- https://git.kernel.org/stable/c/ca8bed31edf728a662ef9d6f39f50e7a7dc2b5ad Patch
- https://git.kernel.org/stable/c/cce57cd8c5dead24127cf2308fdd60fcad2d6ba6 Patch
- https://www.zerodayinitiative.com/advisories/ZDI-25-310/ Third Party Advisory