Tracker / CVE-2026-31659
CVE-2026-31659
In the Linux kernel, the following vulnerability has been resolved: batman-adv: reject oversized global TT response buffers batadv_tt_prepare_tvlv_global_data() builds the allocation length for a global TT response in 16-bit temporaries. When a remote originator advertises a large enough global TT, the TT payload length plus the VLAN header offset can exceed 65535 and wrap before kmalloc(). The full-table response path still uses the original TT payload length when it fills tt_change, so the wrapped allocation is too small and batadv_tt_prepare_tvlv_global_data() writes past the end of the heap object before the later packet-size check runs. Fix this by rejecting TT responses whose TVLV value length cannot fit in the 16-bit TVLV payload length field.
Affected products and versions
| linux | linux_kernel |
|---|---|
| linux | linux_kernel · 3.13.1 → 5.10.253 |
| linux | linux_kernel · 5.11 → 5.15.203 |
| linux | linux_kernel · 5.16 → 6.1.169 |
| linux | linux_kernel · 6.13 → 6.18.23 |
| linux | linux_kernel · 6.19 → 6.19.13 |
| linux | linux_kernel · 6.2 → 6.6.135 |
| linux | linux_kernel · 6.7 → 6.12.82 |