SB20260727211 - NULL pointer dereference in Linux kernel mediatek jpeg driver

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Main Vulnerability Database SB20260727211

SB20260727211 - NULL pointer dereference in Linux kernel mediatek jpeg driver

Published: July 27, 2026

Security Bulletin ID SB20260727211
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Partial DoS

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) NULL pointer dereference (CVE-ID: CVE-2026-64358)

CWE-ID: CWE-476 - NULL Pointer Dereference

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


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper handling of a null workqueue callback in mtk_jpeg_release() when releasing a JPEG device context on platforms that do not use the workqueue. A local user can trigger release of the affected device context to cause a denial of service.

The issue results in a WARN_ON condition in __flush_work() because cancel_work_sync() is invoked even when no workqueue callback is defined.


Remediation

Install update from vendor's website.

References