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CVE-2026-99128VulnerabilityPublished

Microsoft · sctp: validate chunk length

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-99128· High

Not known to be exploited · fixed in 40507f59f230dcf60ae13cb48d34f8c6e9f40659 : patch Microsoft soon.

Data as of 29 Oct 2026, 11:49 UTC

Severity
High

Rated by Threat Radar · CVSS not yet scored by NVD

Thin evidence

One scorer or none
Patch
Available – fixed in 40507f59f230dcf60ae13cb48d34f8c6e9f40659, 9ac57e4c62e93c287b36080e5da3645690549990, 6cfc1b90cb86f4aabc69fb8e30128e07e2cdfa3a

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 28 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 29 Oct 2026.

What to do

Upgrade Linux to 40507f59f230dcf60ae13cb48d34f8c6e9f40659, 9ac57e4c62e93c287b36080e5da3645690549990 or 6cfc1b90cb86f4aabc69fb8e30128e07e2cdfa3a.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ bbd0d59809f923ea2b540cbd781b32110e249f6e, < 40507f59f230dcf60ae13cb48d34f8c6e9f40659
Fixed in
  • 40507f59f230dcf60ae13cb48d34f8c6e9f40659
LinuxLinuxAffected
  • ≥ bbd0d59809f923ea2b540cbd781b32110e249f6e, < 9ac57e4c62e93c287b36080e5da3645690549990
Fixed in
  • 9ac57e4c62e93c287b36080e5da3645690549990
LinuxLinuxAffected
  • ≥ bbd0d59809f923ea2b540cbd781b32110e249f6e, < 6cfc1b90cb86f4aabc69fb8e30128e07e2cdfa3a
Fixed in
  • 6cfc1b90cb86f4aabc69fb8e30128e07e2cdfa3a
LinuxLinuxAffected
  • =2.6.24
Fixed in–

Description

This vulnerability involves improper validation of chunk length in the SCTP inqueue parser in Microsoft software version 3.0. The issue was published on October 29, 2026. No CVSS score or detailed impact information is provided, and no known exploits are reported in the wild.

References

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