CVE-2026-99234: Linux kernel · tracing: Unregister field variable histograms when the command fails
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 5 Nov 2026, 00:01 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
Thin evidence
One scorer or none- EPSS
- 0.1% chance of exploitation in 30 days – higher than 7% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 2 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 4 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.10linuxpkg:deb/ubuntu/linux?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-oraclepkg:deb/ubuntu/linux-oracle?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A fix is available that ensures field variable histograms are unregistered properly during error cleanup in the tracing subsystem. Users should apply the updated Linux kernel versions that include this fix to prevent resource mismanagement. No additional mitigation actions are required beyond applying the patch.
Description
A vulnerability in the Linux kernel tracing subsystem causes field variable histograms to remain registered when a command fails, leading to resource mismanagement. Specifically, when create_actions() fails after registering a histogram trigger, the trigger is not unregistered properly, leaving it active without tracking. This can cause inconsistencies and potential resource leaks in kernel tracing.
References
- ubuntu.com/security/CVE-2026-99234 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-99234 (opens in a new tab)
- git.kernel.org/stable/c/8482ec5b65f606d5bbcec518e0afc69ad65ca414 (opens in a new tab)
- git.kernel.org/stable/c/5afb9317e2eeb1c7021a82995ce244fda5a4bd4f (opens in a new tab)
- git.kernel.org/stable/c/a3d7ffd2409700748a495b645948fef48199206e (opens in a new tab)
- git.kernel.org/stable/c/dba0f492703956801149cc70b39d2650a37995c3 (opens in a new tab)
- git.kernel.org/stable/c/d0090baf02dd08f6e909f36f0ad54a4e80f5e79b (opens in a new tab)
- git.kernel.org/stable/c/aae0ccd7326eef78dcdefffef3d1253e6f0615ca (opens in a new tab)
- git.kernel.org/stable/c/f21351d1c4cdcc6a68f03636a407c2af1a5e1e10 (opens in a new tab)
- git.kernel.org/stable/c/431959fc76456cbba539279fe8967aa9391e6f23 (opens in a new tab)