Memory leak in Linux kernel - CVE-2026-89837
Published: September 17, 2026
Vulnerability identifier: #VU150449
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-2026-89837
CWE-ID: CWE-401
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 a missing release of a folio reference in find_in_level() in the f2fs directory-handling code when handling an error returned by find_in_block(). A local user can perform directory lookups that encounter find_in_block() errors to cause a denial of service.
Affected software
Linux kernel
How to mitigate CVE-2026-89837
Install security update from vendor's repository.