SB2026090439 - Improper Check for Unusual or Exceptional Conditions in Linux kernel trace

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Main Vulnerability Database SB2026090439

SB2026090439 - Improper Check for Unusual or Exceptional Conditions in Linux kernel trace

Published: September 4, 2026

Security Bulletin ID SB2026090439
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 Check for Unusual or Exceptional Conditions (CVE-ID: CVE-2026-80730)

CWE-ID: CWE-754 - Improper Check for Unusual or Exceptional Conditions

CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/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 an improper check for exceptional conditions in the ring-buffer self-test cleanup loop when handling a failed kthread creation. A local user can trigger cleanup after kthread_run_on_cpu() returns an error pointer to cause a denial of service.

The issue occurs during the late_initcall self-test.


Remediation

Install update from vendor's website.

References