CVE-2026-99243: Linux kernel · io-wq: order the exit bit against worker creation task work
Source GCVE Database
Not known to be exploited · fixed in a63c752157eacf49f628359822666b32503d194a : update Linux kernel when convenient.
Data as of 3 Nov 2026, 13:28 UTC
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
Disclosed: evidence found.
CVE published 3 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in– |
Red Hatredhat/kernelpkg:rpm/redhat/kernelOther threats | Affected
| Fixed in
|
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
- nvd.nist.gov/vuln/detail/CVE-2026-99243 (opens in a new tab)
- git.kernel.org/stable/c/0d81cdd433b0a96c5275c01b8172e0b1f71dd595 (opens in a new tab)
- git.kernel.org/stable/c/1432d881d99584105122760133caeff1dce7a9f7 (opens in a new tab)
- git.kernel.org/stable/c/31fc780b75b278d37700373d54a99fdb4117fdd6 (opens in a new tab)
- git.kernel.org/stable/c/67da3eec264aeb67835886720243ae2dc1463315 (opens in a new tab)
- git.kernel.org/stable/c/6cf012a4d5e461c788ecc9dbed67adc31a142644 (opens in a new tab)
- git.kernel.org/stable/c/75395db7a9b40a2e826c838e648fef8ed1a2d174 (opens in a new tab)
- git.kernel.org/stable/c/a63c752157eacf49f628359822666b32503d194a (opens in a new tab)