SB20260816296 - Information disclosure in Linux kernel events amd

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB20260816296

SB20260816296 - Information disclosure in Linux kernel events amd

Published: August 16, 2026

Security Bulletin ID SB20260816296
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Information disclosure

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Information disclosure (CVE-ID: CVE-2026-72237)

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

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


The vulnerability allows a local user to disclose kernel memory addresses.

The vulnerability exists due to improper access control in the amd_brs_match_plm() branch privilege-level filtering in the AMD BRS perf event handling code when processing user-only branch stack sampling requests. A local user can invoke perf branch sampling with PERF_SAMPLE_BRANCH_USER to disclose kernel memory addresses.

The issue affects AMD processors supporting X86_FEATURE_BRS and occurs for branch records that transition from the kernel to user space.


Remediation

Install update from vendor's website.

References