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CVE-2026-99273VulnerabilityPublished Updated

Microsoft · ksmbd: reserve space for the UTF-16 terminator in stream info

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-99273· Medium

Not known to be exploited · fixed in a025c4991a7d83edc4dd339e3ea86d8ff6226eca : update Microsoft when convenient.

Data as of 14 Nov 2026, 08:49 UTC

Severity
Medium

Rated by Threat Radar · CVSS not yet scored by NVD

Thin evidence

One scorer or none
Patch
Available – fixed in a025c4991a7d83edc4dd339e3ea86d8ff6226eca, 583ede545a14f275a959772b5e1e50fe3e14b861, 7.3.2 +4

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 7 Nov 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 13 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • <6.12.117
  • <6.18.61
  • <7.3.2
Fixed in
  • a025c4991a7d83edc4dd339e3ea86d8ff6226eca
  • 583ede545a14f275a959772b5e1e50fe3e14b861
  • 7.3.2
  • 06a751809ebd33e95b05bf733697318a17a4872b
  • 6.18.61
  • 6.12.117
  • 0e64f89563164719ceb1aa33f2a8bfd6391fa340

Description

This vulnerability involves the ksmbd component where space for the UTF-16 terminator in stream information is not properly reserved. The advisory references Microsoft's support lifecycle but does not provide specific technical details or impact information.

References

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