AZL-83870
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-83870.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/AZL-83870
- Upstream
- Published
- 2026-04-24T15:16:45Z
- Modified
- 2026-08-28T17:47:52Z
- Summary
- CVE-2026-31659 affecting package kernel for versions less than 6.6.137.1-1
- Details
-
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.
- References