CVE-2026-31683

Description

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.

References

• https://git.kernel.org/stable/c/0b10a8b355c3f71012ce89289ec2c2f5e3bfd6c1
• https://git.kernel.org/stable/c/0d4aef630be9d5f9c1227d07669c26c4383b5ad0
• https://git.kernel.org/stable/c/0e35db29fc5a97a8553f7c2d3a2ba730e46b1ee8
• https://git.kernel.org/stable/c/1ada20331f2df2a942d6b83ae1f04a304b642e2a
• https://git.kernel.org/stable/c/67176c96f325837b0bb3e9538ca2eba414f447d8
• https://git.kernel.org/stable/c/6755347c5f9bdd44dee80f692208b056fcd40a52
• https://git.kernel.org/stable/c/6e40ebb999c2c3d2fbb3cacb61f0384ee6e69075
• https://git.kernel.org/stable/c/eda89a1bae0602aec8314ced299bb243b9f9aeef