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.
Product status
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 25aab6bfc31017a7e52035b99aef5c2b6bde8ffb
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 6e0110ea90313b7c0558a0b77038274a6821caf8
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 7c48fdf2d1349bb54815b56fb012b9d577707708
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before bd8955337e3764f912f49b360e176d8aaecf7016
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 94d1a8bd08af1f4cc345c5c29f5db1ea72b8bb8c
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 9f5fa78d9980fe75a69835521627ab7943cb3d67
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before ba1096c315283ee3292765f6aea4cca15816c4f7
2.6.12
Any version before 2.6.12
5.10.249 (semver)
5.15.199 (semver)
6.1.162 (semver)
6.6.122 (semver)
6.12.68 (semver)
6.18.8 (semver)
6.19 (original_commit_for_fix)
References
git.kernel.org/...c/25aab6bfc31017a7e52035b99aef5c2b6bde8ffb
git.kernel.org/...c/6e0110ea90313b7c0558a0b77038274a6821caf8
git.kernel.org/...c/7c48fdf2d1349bb54815b56fb012b9d577707708
git.kernel.org/...c/bd8955337e3764f912f49b360e176d8aaecf7016
git.kernel.org/...c/94d1a8bd08af1f4cc345c5c29f5db1ea72b8bb8c
git.kernel.org/...c/9f5fa78d9980fe75a69835521627ab7943cb3d67
git.kernel.org/...c/ba1096c315283ee3292765f6aea4cca15816c4f7