CVE-2026-72232
Description
AI Translation Available
In the Linux kernel, the following vulnerability has been resolved:
batman-adv: ensure minimal ethernet header on TX
As documented in commit 8bd67ebb50c0 ('net: bridge: xmit: make sure we have
at least eth header len bytes'), it is possible by for a local user with
eBPF TC hook access to attach a tc filter which truncates the packet and
redirects to an batadv interface. But the code assumes that at least
ETH_HLEN bytes are available and thus might read outside of the available
buffer.
The batadv_interface_tx() must therefore always check itself if enough data
is available for the ethernet header and don't rely on min_header_len.
https://git.kernel.org/stable/c/38cd10b0aeec755d89f78722a2b83f4088ff0cb0
https://git.kernel.org/stable/c/49df66b7993c80b80c7eb9a84ba5b3410c8296a0
https://git.kernel.org/stable/c/58799078afebd5115e052bf69ad6697f9759dd6f
https://git.kernel.org/stable/c/6b4f521e01257387906f8b969ad3450d8208d4e2
https://git.kernel.org/stable/c/811fea37620f2097955d95ce81cfdba03fd30f1b
https://git.kernel.org/stable/c/9e16b6751a8206de0b865d99bb02771e6751d12d
https://git.kernel.org/stable/c/dbeb4145d9778f922f459935da9a027750765a69
https://git.kernel.org/stable/c/e6640923afee619d9fa82b07394dc9498e202304