CVE-2026-98953
kernel: devlink: fix devlink_rel reference leak when notify work is pending
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 23, 2026
Updated · October 29, 2026
Description
A flaw was found in the Linux kernel's devlink subsystem. An improper reference count management issue occurs when scheduling notification work for nested devlink instances that are already pending. A local user could exploit this flaw by repeatedly registering and unregistering nested devlink instances, causing a memory leak that can lead to resource exhaustion and 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 · 3.3CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CWE-911 · Improper Update of Reference Count