Description
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.
Metrics
CVSS 3.1 7.8/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 25aab6bfc31017a7e52035b99aef5c2b6bde8ffb; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 6e0110ea90313b7c0558a0b77038274a6821caf8; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 7c48fdf2d1349bb54815b56fb012b9d577707708; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < bd8955337e3764f912f49b360e176d8aaecf7016; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 94d1a8bd08af1f4cc345c5c29f5db1ea72b8bb8c; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 9f5fa78d9980fe75a69835521627ab7943cb3d67; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < ba1096c315283ee3292765f6aea4cca15816c4f7 |
| Linux | Linux | 2.6.12 |
References
- https://git.kernel.org/stable/c/25aab6bfc31017a7e52035b99aef5c2b6bde8ffbPatch
- https://git.kernel.org/stable/c/6e0110ea90313b7c0558a0b77038274a6821caf8Patch
- https://git.kernel.org/stable/c/7c48fdf2d1349bb54815b56fb012b9d577707708Patch
- https://git.kernel.org/stable/c/94d1a8bd08af1f4cc345c5c29f5db1ea72b8bb8cPatch
- https://git.kernel.org/stable/c/9f5fa78d9980fe75a69835521627ab7943cb3d67Patch
- https://git.kernel.org/stable/c/ba1096c315283ee3292765f6aea4cca15816c4f7Patch
- https://git.kernel.org/stable/c/bd8955337e3764f912f49b360e176d8aaecf7016Patch
Timeline
- Published
- Feb 4, 2026
- Last modified
- Jun 17, 2026
- NVD status
- Modified