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Back to active CVEs
High · CVSS 7.5CVE-2025-22037

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

Answer in brief

CVE-2025-22037 records a High severity (CVSS 7.5) vulnerability in ksmbd: fix null pointer dereference in alloc_preauth_hash(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Apr 16, 2025Updated Oct 30, 2026Source checked Nov 3, 2026First seen by HOL Aug 5, 2026Material review Oct 30, 2026
Upstream Advisory

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-476
Source
CVE List V5
Source checked
Nov 3, 2026
References
7 linked sources
Open source record

Key facts

Risk
High · CVSS 7.5
Exploitation
Not marked as known exploited
Affected software
4 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
ProductAffected versionsFixed versions
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*Not reportedNot reported
Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linux/Linuxgeneric>=0626e6641f6b467447c81dd7678a69c66f7746cf <cce57cd8c5dead24127cf2308fdd60fcad2d6ba6 || >=0626e6641f6b467447c81dd7678a69c66f7746cf <ca8bed31edf728a662ef9d6f39f50e7a7dc2b5ad || >=0626e6641f6b467447c81dd7678a69c66f7746cf <8f216b33a5e1b3489c073b1ea1b3d7cb63c8dc4d || >=0626e6641f6b467447c81dd7678a69c66f7746cf <b8eb243e670ecf30e91524dd12f7260dac07d335 || >=0626e6641f6b467447c81dd7678a69c66f7746cf <c8b5b7c5da7d0c31c9b7190b4a7bba5281fc4780cce57cd8c5dead24127cf2308fdd60fcad2d6ba6, ca8bed31edf728a662ef9d6f39f50e7a7dc2b5ad, 8f216b33a5e1b3489c073b1ea1b3d7cb63c8dc4d, b8eb243e670ecf30e91524dd12f7260dac07d335, c8b5b7c5da7d0c31c9b7190b4a7bba5281fc4780
Linux/Linuxgeneric5.15Not reported
Linux/Linuxgeneric>=0626e6641f6b467447c81dd7678a69c66f7746cf <2d3461d6ae74ebdcd4d65128c855198649bcadcd || >=0626e6641f6b467447c81dd7678a69c66f7746cf <cce57cd8c5dead24127cf2308fdd60fcad2d6ba6 || >=0626e6641f6b467447c81dd7678a69c66f7746cf <ca8bed31edf728a662ef9d6f39f50e7a7dc2b5ad || >=0626e6641f6b467447c81dd7678a69c66f7746cf <8f216b33a5e1b3489c073b1ea1b3d7cb63c8dc4d || >=0626e6641f6b467447c81dd7678a69c66f7746cf <b8eb243e670ecf30e91524dd12f7260dac07d335 || >=0626e6641f6b467447c81dd7678a69c66f7746cf <c8b5b7c5da7d0c31c9b7190b4a7bba5281fc47802d3461d6ae74ebdcd4d65128c855198649bcadcd, cce57cd8c5dead24127cf2308fdd60fcad2d6ba6, ca8bed31edf728a662ef9d6f39f50e7a7dc2b5ad, 8f216b33a5e1b3489c073b1ea1b3d7cb63c8dc4d, b8eb243e670ecf30e91524dd12f7260dac07d335, c8b5b7c5da7d0c31c9b7190b4a7bba5281fc4780

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux, Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to cce57cd8c5dead24127cf2308fdd60fcad2d6ba6; Linux/Linux to 2d3461d6ae74ebdcd4d65128c855198649bcadcd if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Apr 16, 2025

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 30, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 5, 2026

Sources and claim methodology

  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencezerodayinitiative.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Possible panic from Git source resolverAlso CWE-476