CVE-2026-74718
kernel: devlink: fix net namespace reference leak in reload
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · August 22, 2026
Updated · October 29, 2026
Description
A flaw was found in the devlink component of the Linux kernel. When the devlink_nl_reload_doit() function is called, it may fail to release a network namespace reference under specific error conditions. This oversight occurs when the requested network namespace differs from the current one and the reload action is not DRIVER_REINIT. A local attacker could exploit this reference leak to cause resource exhaustion, leading to 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-911 · Improper Update of Reference Count