CVE-2026-23098

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 25aab6bfc31017a7e52035b99aef5c2b6bde8ffbaffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 6e0110ea90313b7c0558a0b77038274a6821caf8affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 7c48fdf2d1349bb54815b56fb012b9d577707708affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < bd8955337e3764f912f49b360e176d8aaecf7016affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 94d1a8bd08af1f4cc345c5c29f5db1ea72b8bb8caffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9f5fa78d9980fe75a69835521627ab7943cb3d67affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < ba1096c315283ee3292765f6aea4cca15816c4f7affected
LinuxLinux2.6.12affected
LinuxLinux0 < 2.6.12unaffected
LinuxLinux5.10.249 <= 5.10.*unaffected
LinuxLinux5.15.199 <= 5.15.*unaffected
LinuxLinux6.1.162 <= 6.1.*unaffected
LinuxLinux6.6.122 <= 6.6.*unaffected
LinuxLinux6.12.68 <= 6.12.*unaffected
LinuxLinux6.18.8 <= 6.18.*unaffected
LinuxLinux6.19 <= *unaffected

Weaknesses

References