SB20260529136 - Improper input validation in Linux kernel loongarch pci

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Main Vulnerability Database SB20260529136

SB20260529136 - Improper input validation in Linux kernel loongarch pci

Published: May 29, 2026

Security Bulletin ID SB20260529136
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) Improper input validation (CVE-ID: CVE-2026-46156)

CWE-ID: CWE-20 - Improper input validation

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.

The vulnerability exists due to improper input validation in loongson_gpu_fixup_dma_hang() when scanning PCI devices during system initialization. A local user can attach a discrete GPU in a configuration that causes an invalid register address to be used to trigger a kernel panic.

The issue occurs on LoongArch systems when a discrete GPU is present and the switch logic does not match the expected device cases.


Remediation

Install update from vendor's website.

References