CVE-2026-72232
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | c6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 58799078afebd5115e052bf69ad6697f9759dd6f | affected |
| Linux | Linux | c6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 38cd10b0aeec755d89f78722a2b83f4088ff0cb0 | affected |
| Linux | Linux | c6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 811fea37620f2097955d95ce81cfdba03fd30f1b | affected |
| Linux | Linux | c6c8fea29769d998d94fcec9b9f14d4b52b349d3 < e6640923afee619d9fa82b07394dc9498e202304 | affected |
| Linux | Linux | c6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 6b4f521e01257387906f8b969ad3450d8208d4e2 | affected |
| Linux | Linux | c6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 9e16b6751a8206de0b865d99bb02771e6751d12d | affected |
| Linux | Linux | c6c8fea29769d998d94fcec9b9f14d4b52b349d3 < dbeb4145d9778f922f459935da9a027750765a69 | affected |
| Linux | Linux | c6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 49df66b7993c80b80c7eb9a84ba5b3410c8296a0 | affected |
| Linux | Linux | 2.6.38 | affected |
| Linux | Linux | 0 < 2.6.38 | unaffected |
| Linux | Linux | 5.10.261 <= 5.10.* | unaffected |
| Linux | Linux | 5.15.212 <= 5.15.* | unaffected |
| Linux | Linux | 6.1.178 <= 6.1.* | unaffected |
| Linux | Linux | 6.6.145 <= 6.6.* | unaffected |
| Linux | Linux | 6.12.97 <= 6.12.* | unaffected |
| Linux | Linux | 6.18.40 <= 6.18.* | unaffected |
| Linux | Linux | 7.1.5 <= 7.1.* | unaffected |
| Linux | Linux | 7.2 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/58799078afebd5115e052bf69ad6697f9759dd6f
- https://git.kernel.org/stable/c/38cd10b0aeec755d89f78722a2b83f4088ff0cb0
- https://git.kernel.org/stable/c/811fea37620f2097955d95ce81cfdba03fd30f1b
- https://git.kernel.org/stable/c/e6640923afee619d9fa82b07394dc9498e202304
- https://git.kernel.org/stable/c/6b4f521e01257387906f8b969ad3450d8208d4e2
- https://git.kernel.org/stable/c/9e16b6751a8206de0b865d99bb02771e6751d12d
- https://git.kernel.org/stable/c/dbeb4145d9778f922f459935da9a027750765a69
- https://git.kernel.org/stable/c/49df66b7993c80b80c7eb9a84ba5b3410c8296a0
Feedback
Was this page helpful?
Glad to hear it! Please tell us how we can improve.
Sorry to hear that. Please tell us how we can improve.