SB20260626217 - Heap-based buffer overflow in Linux kernel dc bios driver

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Main Vulnerability Database SB20260626217

SB20260626217 - Heap-based buffer overflow in Linux kernel dc bios driver

Published: June 26, 2026

Security Bulletin ID SB20260626217
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) Heap-based buffer overflow (CVE-ID: CVE-2026-53136)

CWE-ID: CWE-122 - Heap-based Buffer Overflow

CVSSv4: 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/E:U/U:Clear


The vulnerability allows a local user to cause a denial of service or execute arbitrary code.

The vulnerability exists due to a heap-based buffer overflow in get_integrated_info_v11() and get_integrated_info_v2_1() in the AMD display BIOS parser when parsing a malformed VBIOS during driver probe. A local user can provide a specially crafted VBIOS with oversized HDMI retimer register counts to cause a denial of service or execute arbitrary code.

Exploitation requires control over the VBIOS data consumed by the driver.


Remediation

Install update from vendor's website.

References