SB20260815153 - Use-after-free in Linux kernel video fbdev driver

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB20260815153

SB20260815153 - Use-after-free in Linux kernel video fbdev driver

Published: August 15, 2026

Security Bulletin ID SB20260815153
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) Use-after-free (CVE-ID: CVE-2026-74320)

CWE-ID: CWE-416 - Use After Free

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 use-after-free in the sm501fb OF binding code when parsing device tree mode and EDID properties during framebuffer initialization. A local user can supply crafted property values or trigger affected initialization paths to cause a denial of service.

The issue also involves a double free, a buffer overrun, and memory leaks when both CRT and PANEL are enabled or when probe error paths are reached.


Remediation

Install update from vendor's website.

References