Improper Check for Unusual or Exceptional Conditions in Linux kernel - CVE-2026-89758
Published: September 12, 2026
Vulnerability identifier: #VU149053
CSH Severity: Low
CVSS v4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89758
CWE-ID: CWE-754
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper handling of non-present PMDs in queue_folios_pmd() when processing memory policy operations on a range containing a device-private PMD. A local user can invoke mbind(), migrate_pages(), or set_mempolicy_home_node() to cause a denial of service.
A device-private PMD can be left when an HMM-based GPU driver migrates an anonymous THP folio to device memory through migrate_vma_pages().
Affected software
Linux kernel
How to mitigate CVE-2026-89758
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3