netrom: fix double-free in nr_route_frame()
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.8epss 0.2%
exploitation probability
0.2%top 92% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/25aab6bfc31017a7e52035b99aef5c2b6bde8ffbhttps://git.kernel.org/stable/c/6e0110ea90313b7c0558a0b77038274a6821caf8https://git.kernel.org/stable/c/7c48fdf2d1349bb54815b56fb012b9d577707708https://git.kernel.org/stable/c/94d1a8bd08af1f4cc345c5c29f5db1ea72b8bb8chttps://git.kernel.org/stable/c/9f5fa78d9980fe75a69835521627ab7943cb3d67https://git.kernel.org/stable/c/ba1096c315283ee3292765f6aea4cca15816c4f7https://git.kernel.org/stable/c/bd8955337e3764f912f49b360e176d8aaecf7016