CVE-2026-72232

batman-adv: ensure minimal ethernet header on TX

State: Published
Severity: 7.8 High
Published: Aug 15, 2026
Updated: Oct 16, 2026
Reserved: Aug 9, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	c6c8fea29769d998d94fcec9b9f14d4b52b349d3 to before 58799078afebd5115e052bf69ad6697f9759dd6fAffected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 to before 38cd10b0aeec755d89f78722a2b83f4088ff0cb0Affected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 to before 811fea37620f2097955d95ce81cfdba03fd30f1bAffected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 to before e6640923afee619d9fa82b07394dc9498e202304Affected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 to before 6b4f521e01257387906f8b969ad3450d8208d4e2Affected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 to before 9e16b6751a8206de0b865d99bb02771e6751d12dAffected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 to before dbeb4145d9778f922f459935da9a027750765a69Affected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 to before 49df66b7993c80b80c7eb9a84ba5b3410c8296a0Affected
LinuxLinux	2.6.38Affected before 2.6.38Not affected 5.10.261 through 5.10.Not affected 5.15.212 through 5.15.Not affected 6.1.178 through 6.1.Not affected 6.6.145 through 6.6.Not affected 6.12.97 through 6.12.Not affected 6.18.40 through 6.18.Not affected 7.1.5 through 7.1.*Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

c6c8fea29769d998d94fcec9b9f14d4b52b349d3 to before 58799078afebd5115e052bf69ad6697f9759dd6fAffected
c6c8fea29769d998d94fcec9b9f14d4b52b349d3 to before 38cd10b0aeec755d89f78722a2b83f4088ff0cb0Affected
c6c8fea29769d998d94fcec9b9f14d4b52b349d3 to before 811fea37620f2097955d95ce81cfdba03fd30f1bAffected
c6c8fea29769d998d94fcec9b9f14d4b52b349d3 to before e6640923afee619d9fa82b07394dc9498e202304Affected
c6c8fea29769d998d94fcec9b9f14d4b52b349d3 to before 6b4f521e01257387906f8b969ad3450d8208d4e2Affected
c6c8fea29769d998d94fcec9b9f14d4b52b349d3 to before 9e16b6751a8206de0b865d99bb02771e6751d12dAffected
c6c8fea29769d998d94fcec9b9f14d4b52b349d3 to before dbeb4145d9778f922f459935da9a027750765a69Affected
c6c8fea29769d998d94fcec9b9f14d4b52b349d3 to before 49df66b7993c80b80c7eb9a84ba5b3410c8296a0Affected

LinuxLinux

2.6.38Affected
before 2.6.38Not affected
5.10.261 through 5.10.*Not affected
5.15.212 through 5.15.*Not affected
6.1.178 through 6.1.*Not affected
6.6.145 through 6.6.*Not affected
6.12.97 through 6.12.*Not affected
6.18.40 through 6.18.*Not affected
7.1.5 through 7.1.*Not affected
7.2 and laterNot affected

References

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