CVE-2026-23098
kernel: netrom: Denial of Service via double-free vulnerability in nr_route_frame()
Severity
ImportantRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · February 4, 2026
Updated · August 21, 2026
Description
A flaw was found in netrom. In the Linux kernel's netrom component, a double-free vulnerability exists within the nr_route_frame() function. This occurs because the old_skb object is freed without properly checking if a related pointer (nr_neigh->ax25) is null. If the pointer is null, the system attempts to free the same memory again, which can lead to a system crash and 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 · 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-1341 · Multiple Releases of Same Resource or Handle