CVE-2026-72232

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxc6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 58799078afebd5115e052bf69ad6697f9759dd6faffected
LinuxLinuxc6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 38cd10b0aeec755d89f78722a2b83f4088ff0cb0affected
LinuxLinuxc6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 811fea37620f2097955d95ce81cfdba03fd30f1baffected
LinuxLinuxc6c8fea29769d998d94fcec9b9f14d4b52b349d3 < e6640923afee619d9fa82b07394dc9498e202304affected
LinuxLinuxc6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 6b4f521e01257387906f8b969ad3450d8208d4e2affected
LinuxLinuxc6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 9e16b6751a8206de0b865d99bb02771e6751d12daffected
LinuxLinuxc6c8fea29769d998d94fcec9b9f14d4b52b349d3 < dbeb4145d9778f922f459935da9a027750765a69affected
LinuxLinuxc6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 49df66b7993c80b80c7eb9a84ba5b3410c8296a0affected
LinuxLinux2.6.38affected
LinuxLinux0 < 2.6.38unaffected
LinuxLinux5.10.261 <= 5.10.*unaffected
LinuxLinux5.15.212 <= 5.15.*unaffected
LinuxLinux6.1.178 <= 6.1.*unaffected
LinuxLinux6.6.145 <= 6.6.*unaffected
LinuxLinux6.12.97 <= 6.12.*unaffected
LinuxLinux6.18.40 <= 6.18.*unaffected
LinuxLinux7.1.5 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References