SB20260828174 - Improper control of a resource through its lifetime in Linux kernel powerpc perf

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Main Vulnerability Database SB20260828174

SB20260828174 - Improper control of a resource through its lifetime in Linux kernel powerpc perf

Published: August 28, 2026

Security Bulletin ID SB20260828174
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper control of a resource through its lifetime (CVE-ID: CVE-2026-80626)

CWE-ID: CWE-664 - Improper control of a resource through its lifetime

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper resource management in fsl_emb_pmu_del() when removing a perf event with a negative hardware index. A local user can trigger the vulnerable code path to cause a denial of service.

On systems with CONFIG_PREEMPT enabled, the issue can underflow preempt_count and manifest as a "scheduling while atomic" BUG.


Remediation

Install update from vendor's website.

References