Improper Check or Handling of Exceptional Conditions in Linux kernel - CVE-2026-89805
Published: September 17, 2026
Vulnerability identifier: #VU150481
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2026-89805
CWE-ID: CWE-703
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Linux kernel
How to mitigate CVE-2026-89805
Install security update from vendor's repository.