High 7.5Published Apr 16, 2025

CVE-2025-22037ksmbd: fix null pointer dereference in alloc_preauth_hash()

Updated under an hour ago (Oct 28, 2026, 1:00 AM ET)

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Exploited in the last 30 days

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.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: Aug 5, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 0626e6641f6b467447c81dd7678a69c66f7746cf before cce57cd8c5dead24127cf2308fdd60fcad2d6ba6; from 0626e6641f6b467447c81dd7678a69c66f7746cf before ca8bed31edf728a662ef9d6f39f50e7a7dc2b5ad; 0626e6641f6b467447c81dd7678a69c66f7746cf builds before 8f216b33a5e1b3489c073b1ea1b3d7cb63c8dc4d; from 0626e6641f6b467447c81dd7678a69c66f7746cf before b8eb243e670ecf30e91524dd12f7260dac07d335; from 0626e6641f6b467447c81dd7678a69c66f7746cf before c8b5b7c5da7d0c31c9b7190b4a7bba5281fc4780	CNA record
linux linux_kernel linux:linux_kernel	from 6.6 before 6.6.107; from 6.12 before 6.12.23; from 6.13 before 6.13.11; from 6.14 before 6.14.2	NVD

References

References

https://git.kernel.org/stable/c/cce57cd8c5dead24127cf2308fdd60fcad2d6ba6	patch
https://git.kernel.org/stable/c/ca8bed31edf728a662ef9d6f39f50e7a7dc2b5ad	patch
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://www.zerodayinitiative.com/advisories/ZDI-25-310/	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.