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CVE-2026-98681VulnerabilityPublished Updated

Microsoft · smb: client: split cifsFileInfo bitfields to avoid shared-byte RMW races

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-98681· Medium

Not known to be exploited · fixed in f255e87b4f7eda568c37d6eae5db1d1a8aca5968 : update Microsoft when convenient.

Data as of 7 Nov 2026, 12:18 UTC

Severity
Medium

Rated by Threat Radar · CVSS not yet scored by NVD

Thin evidence

One scorer or none
Patch
Available – fixed in f255e87b4f7eda568c37d6eae5db1d1a8aca5968, e961baf9c1a4f2e93a55f8eb2c6151fc27b96a4c, d9d23d115610e0342e768f6cb525d91c7b154027 +5

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 18 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 7 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 3bc303c254335dbd7c7012cc1760b12f1d5514d3, < f255e87b4f7eda568c37d6eae5db1d1a8aca5968
Fixed in
  • f255e87b4f7eda568c37d6eae5db1d1a8aca5968
LinuxLinuxAffected
  • ≥ 3bc303c254335dbd7c7012cc1760b12f1d5514d3, < e961baf9c1a4f2e93a55f8eb2c6151fc27b96a4c
Fixed in
  • e961baf9c1a4f2e93a55f8eb2c6151fc27b96a4c
LinuxLinuxAffected
  • ≥ 3bc303c254335dbd7c7012cc1760b12f1d5514d3, < d9d23d115610e0342e768f6cb525d91c7b154027
Fixed in
  • d9d23d115610e0342e768f6cb525d91c7b154027
LinuxLinuxAffected
  • ≥ 3bc303c254335dbd7c7012cc1760b12f1d5514d3, < 4165641d06ef44f3a31b77a28048b6c737e885e7
Fixed in
  • 4165641d06ef44f3a31b77a28048b6c737e885e7
LinuxLinuxAffected
  • ≥ 3bc303c254335dbd7c7012cc1760b12f1d5514d3, < 19465a9aeb664f1d710d0d22c07c31bfb7c85446
Fixed in
  • 19465a9aeb664f1d710d0d22c07c31bfb7c85446
LinuxLinuxAffected
  • ≥ 3bc303c254335dbd7c7012cc1760b12f1d5514d3, < 3786ee67658a2c80fef2544e7de2cd329e043cf9
Fixed in
  • 3786ee67658a2c80fef2544e7de2cd329e043cf9

Description

To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

References

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