CVE-2026-31703
kernel: writeback: Fix use after free in inode_switch_wbs_work_fn()
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · May 1, 2026
Updated · August 20, 2026
Description
A flaw was found in the Linux kernel. A use-after-free vulnerability exists in the inode_switch_wbs_work_fn() function, part of the kernel's writeback subsystem. This issue arises when a work item remains active after its associated memory object (wb) has been released, leading to system instability. An attacker could potentially exploit this vulnerability to cause a denial of service.
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 · 7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-825 · Expired Pointer Dereference