CVE-2026-23271perf: Fix __perf_event_overflow() vs perf_remove_from_context() race
Updated under an hour ago ()
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It affects Linux and 5 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 592903cdcbf606a838056bae6d03fc557806c914 builds before 4df1a45819e50993cb351682a6ae8e7ed2d233a0; 592903cdcbf606a838056bae6d03fc557806c914 builds before 4f8d5812337871227bb2c98669a87c306a2f86ef; 592903cdcbf606a838056bae6d03fc557806c914 builds before 5c48fdc4b4623533d86e279f51531a7ba212eb87; 592903cdcbf606a838056bae6d03fc557806c914 builds before 3f89b61dd504c5b6711de9759e053b082f9abf12; from 592903cdcbf606a838056bae6d03fc557806c914 before bb190628fe5f2a73ba762a9972ba16c5e895f73e; from 592903cdcbf606a838056bae6d03fc557806c914 before c9bc1753b3cc41d0e01fbca7f035258b5f4db0ae | CNA record |
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | all versions | CISA ADP |
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
linux linux_kernel linux:linux_kernel | from 2.6.31 before 6.1.167; from 6.2 before 6.6.130; from 6.7 before 6.12.77; from 6.13 before 6.18.17; from 6.19 before 6.19.7; 7.0 | NVD |
References
- https://git.kernel.org/stable/c/4df1a45819e50993cb351682a6ae8e7ed2d233a0patch
- https://git.kernel.org/stable/c/4f8d5812337871227bb2c98669a87c306a2f86efpatch
- https://git.kernel.org/stable/c/5c48fdc4b4623533d86e279f51531a7ba212eb87patch
- https://git.kernel.org/stable/c/3f89b61dd504c5b6711de9759e053b082f9abf12patch
- https://git.kernel.org/stable/c/bb190628fe5f2a73ba762a9972ba16c5e895f73epatch
- https://git.kernel.org/stable/c/c9bc1753b3cc41d0e01fbca7f035258b5f4db0aepatch
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.