CVE-2026-72493
kernel: net: serialize netif_running() check in enqueue_to_backlog()
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · August 15, 2026
Updated · September 1, 2026
Description
A flaw was found in the Linux kernel's networking subsystem. A race condition, specifically a Time-of-check to time-of-use (TOCTOU) vulnerability, exists during network device unregistration. This allows network packets to be processed after a device has been unregistered, leading to a use-after-free condition. This could potentially result in arbitrary code execution or 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 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-772 · Missing Release of Resource after Effective Lifetime