Improper control of a resource through its lifetime in Linux kernel - CVE-2026-90260
Published: September 18, 2026
Vulnerability identifier: #VU151222
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-2026-90260
CWE-ID: CWE-664
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to corrupt filesystem metadata and cause a denial of service.
The vulnerability exists due to improper control of an extent buffer's lifetime in the Btrfs zoned filesystem write path when writing a freed-but-still-dirty tree block. A local user can trigger writeout of a freed-but-still-dirty tree block to corrupt filesystem metadata and cause a denial of service.
Affected software
Linux kernel
How to mitigate CVE-2026-90260
Install security update from vendor's repository.