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CVE-2026-99229VulnerabilityPublished Updated

Microsoft · io_uring/wait: don't spin on a stuck overflow list

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-99229· High

Not known to be exploited · fixed in c347691e5dc5481b2d6943c123619e04847fb0dc : patch Microsoft soon.

Data as of 7 Nov 2026, 12:18 UTC

Severity
High

Rated by Threat Radar · CVSS not yet scored by NVD

Thin evidence

One scorer or none
Patch
Available – fixed in c347691e5dc5481b2d6943c123619e04847fb0dc, bf1d2ed84b3162e3b0e0bb7018ac59147da6e975, a6cfc85c6bf9498aaf1978b503f9663635a1aa22 +3

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 2 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 7 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 3fcf19d592d5cb63eb209400b22055651e3c27d0, < c347691e5dc5481b2d6943c123619e04847fb0dc
Fixed in
  • c347691e5dc5481b2d6943c123619e04847fb0dc
LinuxLinuxAffected
  • ≥ 3fcf19d592d5cb63eb209400b22055651e3c27d0, < bf1d2ed84b3162e3b0e0bb7018ac59147da6e975
Fixed in
  • bf1d2ed84b3162e3b0e0bb7018ac59147da6e975
LinuxLinuxAffected
  • ≥ 3fcf19d592d5cb63eb209400b22055651e3c27d0, < a6cfc85c6bf9498aaf1978b503f9663635a1aa22
Fixed in
  • a6cfc85c6bf9498aaf1978b503f9663635a1aa22
LinuxLinuxAffected
  • ≥ 3fcf19d592d5cb63eb209400b22055651e3c27d0, < 340944e27b4bb218ed0ee66d0947ac70faefa05a
Fixed in
  • 340944e27b4bb218ed0ee66d0947ac70faefa05a
LinuxLinuxAffected
  • ≥ 3fcf19d592d5cb63eb209400b22055651e3c27d0, < 34f5a664c34d3cb62f6bec7f4156754594a7d25b
Fixed in
  • 34f5a664c34d3cb62f6bec7f4156754594a7d25b
LinuxLinuxAffected
  • ≥ 3fcf19d592d5cb63eb209400b22055651e3c27d0, < 4a89352edd8b3e20d1e1fb33f0fc297dd137149f
Fixed in
  • 4a89352edd8b3e20d1e1fb33f0fc297dd137149f

Description

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

References

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