CVE-2026-97534
kernel: f2fs: accurately adjust free_sections during free_segment_range
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 25, 2026
Updated · September 29, 2026
Description
A flaw was found in the Linux kernel's Flash-Friendly File System (F2FS). When segment ranges are truncated, the file system fails to properly adjust the free section counter for sections that were already marked free, leading to an overestimation of available storage during background garbage collection. A local user could exploit this flaw under low-space conditions to trigger allocation failures or kernel assertion errors, resulting in a Denial of Service (DoS).
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-617 · Reachable Assertion