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Vulnerabilities

Vulnerability · CVE-2023-54250

In the Linux kernel, the following vulnerability has been resolved: ksmbd: avoid out of bounds access in decode_preauth_ctxt() Confirm that the accessed pneg_ctxt->HashAlgorithms a

Published Dec 30, 2025 · catalog updated Aug 5, 2026 · Linux Linux

Last checked Nov 1, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2023-54250. EPSS is 0.48%. Act only if a listed version of Linux Linux is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High8.2
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.48%
Remediation
Version ranges on file
Affected products
vendor Linux Linux e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <a2f6ded41bec1d3be643c80a5eb97f1680309001

In the Linux kernel, the following vulnerability has been resolved: ksmbd: avoid out of bounds access in decode_preauth_ctxt() Confirm that the accessed pneg_ctxt->HashAlgorithms address sits within the SMB request boundary; deassemble_neg_contexts() only checks that the eight byte smb2_neg_context header + (client controlled) DataLength are within the packet boundary, which is insufficient. Checking for sizeof(struct smb2_preauth_neg_context) is overkill given that the type currently assumes SMB311_SALT_SIZE bytes of trailing Salt.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Linux Linux e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <a2f6ded41bec1d3be643c80a5eb97f1680309001e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <a2f6ded41bec1d3be643c80a5eb97f1680309001

How to fix CVE-2023-54250

  • Upgrade

    CVE-2023-54250 lists a fix boundary at a2f6ded41bec1d3be643c80a5eb97f1680309001. Compare the installed build with that boundary before you change production.

  • Version check

    Seen in e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <a2f6ded41bec1d3be643c80a5eb97f1680309001

  • Advisory

    Open the cve_org record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2023-54250. EPSS is 0.48%. Act only if a listed version of Linux Linux is installed.

Which versions are affected?

Compare what you have installed with Linux Linux e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <a2f6ded41bec1d3be643c80a5eb97f1680309001 e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <a2f6ded41bec1d3be643c80a5eb97f1680309001. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.48%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Dec 30, 2025 · EUVD

    Detected

    In the Linux kernel, the following vulnerability has been resolved: ksmbd: avoid out of bounds access in decode_preauth_ctxt() Confirm that the accessed pneg_ctxt->HashAlgorithms address sits within the SMB request boundary; deassemble_neg_contexts() only checks that the eight byte smb2_neg_context header + (client controlled) DataLength are within the packet boundary, which is insufficient. Check

  2. Aug 5, 2026 · EUVD

    Updated

    In the Linux kernel, the following vulnerability has been resolved: ksmbd: avoid out of bounds access in decode_preauth_ctxt() Confirm that the accessed pneg_ctxt->HashAlgorithms address sits within the SMB request boundary; deassemble_neg_contexts() only checks that the eight byte smb2_neg_context header + (client controlled) DataLength are within the packet boundary, which is insufficient. Check

Sources

  • CVE.orgVulnerability recordCVE-2023-54250

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2023-54250

    30-day exploitation probability 0.48%

    first.org
  • EUVDVulnerability recordEUVD-2023-60391

    In the Linux kernel, the following vulnerability has been resolved: ksmbd: avoid out of bounds access in decode_preauth_ctxt() Confirm that the accessed pneg_ctxt->HashAlgorithms address sits within the SMB request boundary; deassemble_neg_contexts() only checks that the eight by

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 1, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 1, 2026
  • CVE.orgOct 29, 2026
  • EUVDOct 29, 2026