SB2026090576 - Incorrect calculation in Linux kernel trace

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Main Vulnerability Database SB2026090576

SB2026090576 - Incorrect calculation in Linux kernel trace

Published: September 5, 2026

Security Bulletin ID SB2026090576
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Incorrect calculation (CVE-ID: CVE-2026-80876)

CWE-ID: CWE-682 - Incorrect Calculation

CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause incorrect ring-buffer event data length reporting.

The vulnerability exists due to an improper length calculation in ring_buffer_event_length() when handling small ring-buffer events on architectures with forced 8-byte alignment. A local user can trigger processing of small ring-buffer events to cause incorrect ring-buffer event data length reporting.

The issue was observed on a riscv64 kernel with CONFIG_HAVE_64BIT_ALIGNED_ACCESS enabled.


Remediation

Install update from vendor's website.

References