CVE-2026-23271perf: Fix __perf_event_overflow() vs perf_remove_from_context() race
- 7.8HighCVSS base score
- 0.11%Exploitation in 30 daysEPSS · top 99% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: perf: Fix __perf_event_overflow() vs perf_remove_from_context() race Make sure that __perf_event_overflow() runs with IRQs disabled for all possible callchains. Specifically the software events can end up running it with only preemption disabled. This opens up a race vs perf_event_exit_event() and friends that will go and free various things the overflow path expects to be present, like the BPF program.
Timeline
ID reserved
By Linux
- 2 months later
· 2 months later
Published
- 8 months later
· 8 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.11% · top 99% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 592903cdcbf606a838056bae6d03fc557806c914 – < 4df1a45819e50993cb351682a6ae8e7ed2d233a0
- affected 592903cdcbf606a838056bae6d03fc557806c914 – < 4f8d5812337871227bb2c98669a87c306a2f86ef
- affected 592903cdcbf606a838056bae6d03fc557806c914 – < 5c48fdc4b4623533d86e279f51531a7ba212eb87
- affected 592903cdcbf606a838056bae6d03fc557806c914 – < 3f89b61dd504c5b6711de9759e053b082f9abf12
- affected 592903cdcbf606a838056bae6d03fc557806c914 – < bb190628fe5f2a73ba762a9972ba16c5e895f73e
- affected 592903cdcbf606a838056bae6d03fc557806c914 – < c9bc1753b3cc41d0e01fbca7f035258b5f4db0ae
- affected 2.6.31
- unaffected < 2.6.31
- unaffected 6.1.167 – ≤ 6.1.*
- unaffected 6.6.130 – ≤ 6.6.*
- unaffected 6.12.77 – ≤ 6.12.*
- unaffected 6.18.17 – ≤ 6.18.*
- unaffected 6.19.7 – ≤ 6.19.*
- unaffected 7.0 – ≤ *
References
References10
- https://git.kernel.org/stable/c/4df1a45819e50993cb351682a6ae8e7ed2d233a0 (opens in a new tab)
- https://git.kernel.org/stable/c/4f8d5812337871227bb2c98669a87c306a2f86ef (opens in a new tab)
- https://git.kernel.org/stable/c/5c48fdc4b4623533d86e279f51531a7ba212eb87 (opens in a new tab)
- https://git.kernel.org/stable/c/3f89b61dd504c5b6711de9759e053b082f9abf12 (opens in a new tab)
- https://git.kernel.org/stable/c/bb190628fe5f2a73ba762a9972ba16c5e895f73e (opens in a new tab)
- https://git.kernel.org/stable/c/c9bc1753b3cc41d0e01fbca7f035258b5f4db0ae (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-13605 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-23271)Record last updated .