SB2026081558 - Stack-based buffer overflow in Linux kernel trace

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Main Vulnerability Database SB2026081558

SB2026081558 - Stack-based buffer overflow in Linux kernel trace

Published: August 15, 2026

Security Bulletin ID SB2026081558
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) Stack-based buffer overflow (CVE-ID: CVE-2026-74391)

CWE-ID: CWE-121 - Stack-based buffer overflow

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 a stack-based buffer overflow in synthetic field helpers in kernel/trace/trace_events_hist.c when constructing synthetic variable names and generated histogram commands from long key lists, field names, or saved filters. A local user can supply crafted tracing inputs to cause a denial of service.

The issue occurs in tracing functionality while building fixed-size MAX_FILTER_STR_VAL staging buffers.


Remediation

Install update from vendor's website.

References