SB2026080764 - Improper Check for Unusual or Exceptional Conditions in Linux kernel dma-buf driver

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Main Vulnerability Database SB2026080764

SB2026080764 - Improper Check for Unusual or Exceptional Conditions in Linux kernel dma-buf driver

Published: August 7, 2026

Security Bulletin ID SB2026080764
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) Improper Check for Unusual or Exceptional Conditions (CVE-ID: CVE-2026-64590)

CWE-ID: CWE-754 - Improper Check for Unusual or Exceptional Conditions

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 overlapping dma mappings in udmabuf scatter-gather table mapping when importing a udmabuf into a DRM driver with DMA API debug enabled. A local user can import a udmabuf to trigger a kernel warning to cause a denial of service.

The issue is observed when CONFIG_DMA_API_DEBUG_SG is enabled.


Remediation

Install update from vendor's website.

References