SB20260917159 - Improper Check or Handling of Exceptional Conditions in Linux kernel gpu drm driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper Check or Handling of Exceptional Conditions (CVE-ID: CVE-2026-89805)

CWE-ID: CWE-703 - Improper Check or Handling of Exceptional Conditions

CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to compromise confidentiality, integrity, and availability.

The vulnerability exists due to improper handling of higher-order folio allocation failures in drm_pagemap_migrate_populate_ram_pfn() when migrating RAM PFNs after a higher-order folio allocation fails. A local user can trigger migration under this allocation-failure condition to compromise confidentiality, integrity, and availability.

Source-page entries for demoted destination ranges may be left unset, causing copying to stop after the first page.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/10e92e18e3dab081789d868878f2ecce6166948a
• https://git.kernel.org/stable/c/df72e55e754c8d449321ddddad19a8bd3cb8d032