Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 8f500fbc6c655976c8062b1f1e55bd0b3095d6c2 before f7d395dc5008168ac5b9c1ac2791e59a6078cca1; affected 8f500fbc6c655976c8062b1f1e55bd0b3095d6c2 before 2dd9304727c7041df0a599595910bdbe02ad03c5; affected 8f500fbc6c655976c8062b1f1e55bd0b3095d6c2 before 2becaaeebe230ade1fcd5d0f1cde4d6ee93ec78f; affected 8f500fbc6c655976c8062b1f1e55bd0b3095d6c2 before a6e6ccd5bd07155c2add6c74ce1a5e68ad3b95ea |
| Linux / Linux | affected 6.9; unaffected 0 before 6.9; unaffected 6.12.92 through 6.12.*; unaffected 6.18.34 through 6.18.*; unaffected 7.0.11 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/f7d395dc5008168ac5b9c1ac2791e59a6078cca1
- https://git.kernel.org/stable/c/2dd9304727c7041df0a599595910bdbe02ad03c5
- https://git.kernel.org/stable/c/2becaaeebe230ade1fcd5d0f1cde4d6ee93ec78f
- https://git.kernel.org/stable/c/a6e6ccd5bd07155c2add6c74ce1a5e68ad3b95ea
ADP enrichment
No English description supplied.
No references supplied.