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CVE-2026-99133VulnerabilityPublished

Microsoft · net/iucv: fix the recvmsg window update

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-99133· Medium

Not known to be exploited · fixed in fe7393a627db2d093e8c0cae69d619b30fefae5f : update Microsoft when convenient.

Data as of 29 Oct 2026, 11:49 UTC

Severity
Medium

Rated by Threat Radar · CVSS not yet scored by NVD

Thin evidence

One scorer or none
Patch
Available – fixed in fe7393a627db2d093e8c0cae69d619b30fefae5f, fa5acd038ea657ad5033713d6916214cbd349151, 8f2efa742f4cfe7dd756154f8bc07350dbe3ec92

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 fe7393a627db2d093e8c0cae69d619b30fefae5f, fa5acd038ea657ad5033713d6916214cbd349151 or 8f2efa742f4cfe7dd756154f8bc07350dbe3ec92.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 3881ac441f642d56503818123446f7298442236b, < fe7393a627db2d093e8c0cae69d619b30fefae5f
Fixed in
  • fe7393a627db2d093e8c0cae69d619b30fefae5f
LinuxLinuxAffected
  • ≥ 3881ac441f642d56503818123446f7298442236b, < fa5acd038ea657ad5033713d6916214cbd349151
Fixed in
  • fa5acd038ea657ad5033713d6916214cbd349151
LinuxLinuxAffected
  • ≥ 3881ac441f642d56503818123446f7298442236b, < 8f2efa742f4cfe7dd756154f8bc07350dbe3ec92
Fixed in
  • 8f2efa742f4cfe7dd756154f8bc07350dbe3ec92
LinuxLinuxAffected
  • =3.2
Fixed in–

Description

CVE-2026-99133 is a vulnerability related to the net/iucv component involving a fix to the recvmsg window update. The provided information is minimal and does not describe the nature of the flaw, its impact, or exploitation details. The affected version is exactly 3.0.

References

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