Missing Release of Resource after Effective Lifetime in Linux kernel - CVE-2026-80898
Published: September 5, 2026
Vulnerability identifier: #VU147018
CSH Severity: Low
CVSS v4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80898
CWE-ID: CWE-772
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to retain a folio reference and leave its PG_private_2 state uncleared.
The vulnerability exists due to improper resource cleanup in netfs_pgpriv2_copy_folio() when a copy-to-cache rolling-buffer append fails. A local user can trigger copy-to-cache processing that encounters an append failure to retain a folio reference and leave its PG_private_2 state uncleared.
Affected software
Linux kernel
How to mitigate CVE-2026-80898
Install security update from vendor's repository.