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CVE-2026-99255VulnerabilityPublished Updated

Microsoft · io_uring/io-wq: don't hide a link from cancellations

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-99255· Medium

Not known to be exploited · fixed in ebe8e97fb99d9f374c482902a00677cfd24a6c27 : 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 ebe8e97fb99d9f374c482902a00677cfd24a6c27, d39ebc7a583d650b1d6da9b45e2ce96ad4d877e4, 98470f164286f7f62aaee519d4d11b9370ce6d7b +4

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 3 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
  • ≥ 768134d4f48109b90f4248feecbeeb7d684e410c, < ebe8e97fb99d9f374c482902a00677cfd24a6c27
Fixed in
  • ebe8e97fb99d9f374c482902a00677cfd24a6c27
LinuxLinuxAffected
  • ≥ 768134d4f48109b90f4248feecbeeb7d684e410c, < d39ebc7a583d650b1d6da9b45e2ce96ad4d877e4
Fixed in
  • d39ebc7a583d650b1d6da9b45e2ce96ad4d877e4
LinuxLinuxAffected
  • ≥ 768134d4f48109b90f4248feecbeeb7d684e410c, < 98470f164286f7f62aaee519d4d11b9370ce6d7b
Fixed in
  • 98470f164286f7f62aaee519d4d11b9370ce6d7b
LinuxLinuxAffected
  • ≥ 768134d4f48109b90f4248feecbeeb7d684e410c, < 436d48a2ed13112d2d27085325838e5bce6b4507
Fixed in
  • 436d48a2ed13112d2d27085325838e5bce6b4507
LinuxLinuxAffected
  • ≥ 768134d4f48109b90f4248feecbeeb7d684e410c, < 92e20e9c72bdf6cfa6f84eded7b33399bc7061da
Fixed in
  • 92e20e9c72bdf6cfa6f84eded7b33399bc7061da
LinuxLinuxAffected
  • ≥ 768134d4f48109b90f4248feecbeeb7d684e410c, < 59e45f44c3cea9f4b2d099171c3cec1d25c5b638
Fixed in
  • 59e45f44c3cea9f4b2d099171c3cec1d25c5b638

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

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

References

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