CVE-2026-31683
7.8
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: avoid OGM aggregation when skb tailroom is insufficient
When OGM aggregation state is toggled at runtime, an existing forwarded packet may have been allocated with only packet_len bytes, while a later packet can still be selected for aggregation. Appending in this case can hit skb_put overflow conditions.
Reject aggregation when the target skb tailroom cannot accommodate the new packet. The caller then falls back to creating a new forward packet instead of appending.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | c6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 67176c96f325837b0bb3e9538ca2eba414f447d8 | affected |
| Linux | Linux | c6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 0b10a8b355c3f71012ce89289ec2c2f5e3bfd6c1 | affected |
| Linux | Linux | c6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 6755347c5f9bdd44dee80f692208b056fcd40a52 | affected |
| Linux | Linux | c6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 1ada20331f2df2a942d6b83ae1f04a304b642e2a | affected |
| Linux | Linux | c6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 6e40ebb999c2c3d2fbb3cacb61f0384ee6e69075 | affected |
| Linux | Linux | c6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 0e35db29fc5a97a8553f7c2d3a2ba730e46b1ee8 | affected |
| Linux | Linux | c6c8fea29769d998d94fcec9b9f14d4b52b349d3 < eda89a1bae0602aec8314ced299bb243b9f9aeef | affected |
| Linux | Linux | c6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 0d4aef630be9d5f9c1227d07669c26c4383b5ad0 | affected |
| Linux | Linux | 2.6.38 | affected |
| Linux | Linux | 0 < 2.6.38 | unaffected |
| Linux | Linux | 5.10.253 <= 5.10.* | unaffected |
| Linux | Linux | 5.15.203 <= 5.15.* | unaffected |
| Linux | Linux | 6.1.167 <= 6.1.* | unaffected |
| Linux | Linux | 6.6.130 <= 6.6.* | unaffected |
| Linux | Linux | 6.12.78 <= 6.12.* | unaffected |
| Linux | Linux | 6.18.20 <= 6.18.* | unaffected |
| Linux | Linux | 6.19.10 <= 6.19.* | unaffected |
| Linux | Linux | 7.0 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/67176c96f325837b0bb3e9538ca2eba414f447d8
- https://git.kernel.org/stable/c/0b10a8b355c3f71012ce89289ec2c2f5e3bfd6c1
- https://git.kernel.org/stable/c/6755347c5f9bdd44dee80f692208b056fcd40a52
- https://git.kernel.org/stable/c/1ada20331f2df2a942d6b83ae1f04a304b642e2a
- https://git.kernel.org/stable/c/6e40ebb999c2c3d2fbb3cacb61f0384ee6e69075
- https://git.kernel.org/stable/c/0e35db29fc5a97a8553f7c2d3a2ba730e46b1ee8
- https://git.kernel.org/stable/c/eda89a1bae0602aec8314ced299bb243b9f9aeef
- https://git.kernel.org/stable/c/0d4aef630be9d5f9c1227d07669c26c4383b5ad0
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