Operation on a Resource after Expiration or Release in Linux kernel - CVE-2026-89755
Published: September 12, 2026
Vulnerability identifier: #VU149050
CSH Severity: Low
CVSS v4: 6.8 [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]
CVE-ID: CVE-2026-89755
CWE-ID: CWE-672
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 stale mapping use in __migrate_device_pages() when migrating device pages after freeing swapcache. A local user can trigger device-page migration involving a folio removed from the swap cache to cause a denial of service.
The issue can occur after a large folio is split into order-0 folios.
Affected software
Linux kernel
How to mitigate CVE-2026-89755
Install security update from vendor's repository.