CVE-2026-97933: Linux kernel · tracing: Take trace_array reference when opening a tracer options file
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 13:47 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 10% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 25 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: 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 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther 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 addresses the race condition by safely acquiring references to trace_array elements when opening tracer option files. Users should apply the official kernel updates containing this fix for the affected linux-hwe-edge versions. No additional mitigations are indicated.
Description
A use-after-free vulnerability in the Linux kernel tracing subsystem was resolved by ensuring proper reference counting when opening tracer option files. The flaw involved a race condition where an element used to find the trace array could be freed during instance removal, leading to potential use-after-free. The fix introduces a helper function to safely acquire a reference to the trace array under a lock, preventing the race condition. The vulnerability affects specific versions of the linux-hwe-edge kernel.
References
- ubuntu.com/security/CVE-2026-97933 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-97933 (opens in a new tab)
- git.kernel.org/stable/c/b2fb87d29ffb3a7a9ccc5acf12898ecb80587427 (opens in a new tab)
- git.kernel.org/stable/c/ed0aff60f83a9bdc2f6556376ac79c96b3ce7e80 (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2026-97933 (opens in a new tab)
- git.kernel.org/stable/c/b2890064a12efbeb3b3c093e69e9010dd244c881 (opens in a new tab)