CVE-2026-93275: Linux kernel · perf/x86/intel/pt: Fix stop/start with no update
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in cab5015ee3f25f789b4a368f2abfa65536576b78 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 14:05 UTC
Rated Low by Threat Radar's AI analysis · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 8% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in cab5015ee3f25f789b4a368f2abfa65536576b78, 304844b5545f444d523286da8228a1cbc46ffffa, 2e17bf3a469a41457a3bc31b1f8fd66b6ce94a6d
Exploitation evidence
Disclosed: evidence found.
CVE published 24 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
Upgrade Linux kernel to cab5015ee3f25f789b4a368f2abfa65536576b78, 304844b5545f444d523286da8228a1cbc46ffffa or 2e17bf3a469a41457a3bc31b1f8fd66b6ce94a6d.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in– |
AI-suggested
A fix is available in the Linux kernel as indicated by the fixed commit versions. Users should update to a kernel version including these fixes to resolve the issue. No additional mitigation actions are required beyond applying the official patch.
Description
A flaw in the Linux kernel's perf subsystem for Intel Processor Trace (Intel PT) was fixed. The issue involved improper handling of stop/start calls without the PERF_EF_UPDATE flag, causing nested buffer operations and warnings. This was triggered by group throttling introduced in recent kernel changes, affecting AUX area sampling. The fix ensures balanced begin/end calls for AUX output buffers during event stop/start sequences.