Heap-based buffer overflow in Linux kernel - CVE-2026-53136
Published: June 26, 2026
Vulnerability identifier: #VU135657
CSH Severity: Low
CVSS v4.0: 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
CVE-ID: CVE-2026-53136
CWE-ID: CWE-122
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
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.
How to mitigate CVE-2026-53136
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/029571d51140650783be4fb98fe7cb4754752086
- https://git.kernel.org/stable/c/3f32d52ec604c659725d865cf8cc6a17a33f9c6a
- https://git.kernel.org/stable/c/4d1c3c26c2ab1842e139e61983395d64bd2e518b
- https://git.kernel.org/stable/c/5f8b39452fb16f507c9e4d8b4a83ce27e893307c
- https://git.kernel.org/stable/c/8aaa7e317fbd4beb9c6a9f77aa4cf52fae78b117
- https://git.kernel.org/stable/c/d6be8e59af412623e3d874be3a048406c0edfe60
- https://git.kernel.org/stable/c/fb0707ce00eef4e2d60c3020e1c0432739703e4a