Improper Check for Unusual or Exceptional Conditions in Linux kernel - CVE-2026-80686
Published: August 28, 2026
Vulnerability identifier: #VU146104
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-2026-80686
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 page table entries in migrate_vma_collect_pmd() when processing page migration entries. A local user can trigger page migration involving non-present PTEs to cause a denial of service.
The issue can also result in incorrect dirty folio accounting.
Affected software
Linux kernel
How to mitigate CVE-2026-80686
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/26f9ca8ed42cba25d2c75daff13561cce6019395
- https://git.kernel.org/stable/c/2be94d6b20789b8865b1864dae5fe458ca85e019
- https://git.kernel.org/stable/c/42f30fa5481a1f90571ccdfbb20d2e25e47ae76e
- https://git.kernel.org/stable/c/5b948706f11a950bc73c5304630d0a7eafc40daf
- https://git.kernel.org/stable/c/63867c82d0c0c2d182016a32b1cc0103116b0ea5
- https://git.kernel.org/stable/c/86d55447de3738620b9a8272ff167ce97e7f7203