CVE-2026-23098

netrom: fix double-free in nr_route_frame()

High · published February 4, 2026

CVSS v3.1
8.8
EPSS
0%
Percentile
9.1
In the wild
Unconfirmed
What it is

In the Linux kernel, the following vulnerability has been resolved:

netrom: fix double-free in nr_route_frame()

In nr_route_frame(), old_skb is immediately freed without checking if

nr_neigh->ax25 pointer is NULL. Therefore, if nr_neigh->ax25 is NULL,

the caller function will free old_skb again, causing a double-free bug.

Therefore, to prevent this, we need to modify it to check whether

nr_neigh->ax25 is NULL before freeing old_skb.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00198 · 9.1th percentile
Published
2026-02-04T16:08Z
EPSS history
Timeline
  • 04 FEB 16:08Z
    netrom: fix double-free in nr_route_frame()
    cvelistv5