Description
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: consume only present negotiated TTLM maps ieee80211_tid_to_link_map_size_ok() validates negotiated TTLM elements against the number of link-map entries indicated by link_map_presence. ieee80211_parse_neg_ttlm() must consume the same layout. The parser advanced its cursor for every TID, including TIDs whose presence bit is clear and therefore have no map bytes in the element. A sparse map can then make a later present TID read past the validated element. The bad bytes land in neg_ttlm->{up,down}link[tid] but are gated by valid_links before being applied to driver state, so a peer cannot turn the read into a policy change. Under KUnit + KASAN with an exact-sized element allocation the OOB read is reported as a slab-out-of-bounds; whether the same trigger fires under the production RX path depends on surrounding allocator state. Advance the cursor only when the current TID has a map present.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
8f500fbc6c655976c8062b1f1e55bd0b3095d6c2 to < f7d395dc5008168ac5b9c1ac2791e59a6078cca1affected8f500fbc6c655976c8062b1f1e55bd0b3095d6c2 to < 2dd9304727c7041df0a599595910bdbe02ad03c5affected8f500fbc6c655976c8062b1f1e55bd0b3095d6c2 to < 2becaaeebe230ade1fcd5d0f1cde4d6ee93ec78faffected8f500fbc6c655976c8062b1f1e55bd0b3095d6c2 to < a6e6ccd5bd07155c2add6c74ce1a5e68ad3b95eaaffected
Linux Linux
Default version status: affected
6.9affected0 to < 6.9unaffected6.12.92 to ≤ 6.12.*unaffected6.18.34 to ≤ 6.18.*unaffected7.0.11 to ≤ 7.0.*unaffected7.1 to ≤ *unaffected