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VulnerabilityPublished

CVE-2026-99243: Linux kernel · io-wq: order the exit bit against worker creation task work

Source GCVE Database

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Authoritative record:CVE-2026-99243· Medium

Not known to be exploited · fixed in a63c752157eacf49f628359822666b32503d194a : update Linux kernel when convenient.

Data as of 3 Nov 2026, 13:28 UTC

Severity
Medium

Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD

Thin evidence

One scorer or none
Patch
Available – fixed in a63c752157eacf49f628359822666b32503d194a, 75395db7a9b40a2e826c838e648fef8ed1a2d174, 1432d881d99584105122760133caeff1dce7a9f7 +5

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 3 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • >=5.15.11 <5.15.224
Fixed in
  • a63c752157eacf49f628359822666b32503d194a
  • 75395db7a9b40a2e826c838e648fef8ed1a2d174
  • 1432d881d99584105122760133caeff1dce7a9f7
  • 67da3eec264aeb67835886720243ae2dc1463315
  • 31fc780b75b278d37700373d54a99fdb4117fdd6
  • 6cf012a4d5e461c788ecc9dbed67adc31a142644
  • 5.15.224
  • 0d81cdd433b0a96c5275c01b8172e0b1f71dd595
LinuxLinuxAffected
  • =5.16
Fixed in–
Red Hatredhat/kernelpkg:rpm/redhat/kernelOther threatsAffected
  • >=5.15.11 <5.15.224
  • =5.16
Fixed in
  • 5.15.224

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

Description

A Linux kernel vulnerability involving improper memory ordering in io-wq worker exit bit handling can cause indefinite waiting on worker completion under certain conditions.

References

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