7.8

CVE-2026-23271: perf: Fix __perf_event_overflow() vs perf_remove_from_context() race

Modified
AliasesUBUNTU-CVE-2026-23271DEBIAN-CVE-2026-23271
Published 20-03-2026Last modified 19-10-2026

Vulnerability summary

CVE-2026-23271 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.11% chance of exploitation in the next 30 days, higher than 1.1% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.11%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 19 · Related 19
SUSE-SU-2026:21834-1SUSE-SU-2026:2195-1SUSE-SU-2026:2238-1SUSE-SU-2026:2317-1SUSE-SU-2026:2450-1USN-8567-1

Timeline

  1. 20-03-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.11%

Chance of exploitation in the next 30 days

Percentile

1%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.10% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu157 products
  • linuxAll versions (No fix recorded) | < 6.8.0-136.136
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 6.8.0-1061.64
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 592903cdcbf606a838056bae6d03fc557806c914, < 4df1a45819e50993cb351682a6ae8e7ed2d233a0 | ≥ 592903cdcbf606a838056bae6d03fc557806c914, < 4f8d5812337871227bb2c98669a87c306a2f86ef | ≥ 592903cdcbf606a838056bae6d03fc557806c914, < 5c48fdc4b4623533d86e279f51531a7ba212eb87 | ≥ 592903cdcbf606a838056bae6d03fc557806c914, < 3f89b61dd504c5b6711de9759e053b082f9abf12 | ≥ 592903cdcbf606a838056bae6d03fc557806c914, < bb190628fe5f2a73ba762a9972ba16c5e895f73e | ≥ 592903cdcbf606a838056bae6d03fc557806c914, < c9bc1753b3cc41d0e01fbca7f035258b5f4db0ae | 2.6.31
  • linux_kernel≥ 2.6.31, < 6.1.167 | ≥ 6.2, < 6.6.130 | ≥ 6.7, < 6.12.77 | ≥ 6.13, < 6.18.17 | ≥ 6.19, < 6.19.7 | 7.0:rc1
Debian1 product
  • linux< 6.1.170-1 | < 6.12.85-1 | < 6.19.8-1

3 vendors · 160 products

References

28 links
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