Operation on a Resource after Expiration or Release in Linux kernel - CVE-2026-98080
Published: September 28, 2026
Vulnerability identifier: #VU152376
CSH Severity: Low
CVSS v4: 5.8 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-98080
CWE-ID: CWE-672
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause filesystem metadata corruption and force the filesystem read-only.
The vulnerability exists due to improper reloc root creation in the Btrfs qgroup snapshot accounting path when accounting snapshots during block-group relocation. A local user can perform Btrfs operations that account snapshots during relocation to cause filesystem metadata corruption and force the filesystem read-only.
The issue occurs on Btrfs filesystems with quotas enabled.
Affected software
Linux kernel
How to mitigate CVE-2026-98080
Install security update from vendor's repository.