CVE-2026-99204
kernel: kernel: Denial of Service via use-after-free in OCFS2 DLM debugfs interface
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 28, 2026
Updated · November 2, 2026
Description
A flaw was found in the Linux kernel's OCFS2 (Oracle Cluster File System 2) Distributed Lock Manager (DLM) subsystem. A synchronization issue allows a local user to trigger a use-after-free condition by reading debugfs files while recovery data is concurrently being destroyed and released. This flaw primarily results in a Denial of Service (DoS) by causing a kernel crash, and may potentially lead to the disclosure of sensitive kernel memory.
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 · 4.1CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
CWE-825 · Expired Pointer Dereference