Answer in brief
CVE-2026-64223 records a Unknown severity vulnerability in wifi: mac80211: consume only present negotiated TTLM maps. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=8f500fbc6c655976c8062b1f1e55bd0b3095d6c2 <f7d395dc5008168ac5b9c1ac2791e59a6078cca1 || >=8f500fbc6c655976c8062b1f1e55bd0b3095d6c2 <2dd9304727c7041df0a599595910bdbe02ad03c5 || >=8f500fbc6c655976c8062b1f1e55bd0b3095d6c2 <2becaaeebe230ade1fcd5d0f1cde4d6ee93ec78f || >=8f500fbc6c655976c8062b1f1e55bd0b3095d6c2 <a6e6ccd5bd07155c2add6c74ce1a5e68ad3b95ea | f7d395dc5008168ac5b9c1ac2791e59a6078cca1, 2dd9304727c7041df0a599595910bdbe02ad03c5, 2becaaeebe230ade1fcd5d0f1cde4d6ee93ec78f, a6e6ccd5bd07155c2add6c74ce1a5e68ad3b95ea |
| Linux/Linuxgeneric | 6.9 | Not reported |
Published upstream
Jul 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-64223 records a Unknown severity vulnerability in wifi: mac80211: consume only present negotiated TTLM maps. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=8f500fbc6c655976c8062b1f1e55bd0b3095d6c2 <f7d395dc5008168ac5b9c1ac2791e59a6078cca1 || >=8f500fbc6c655976c8062b1f1e55bd0b3095d6c2 <2dd9304727c7041df0a599595910bdbe02ad03c5 || >=8f500fbc6c655976c8062b1f1e55bd0b3095d6c2 <2becaaeebe230ade1fcd5d0f1cde4d6ee93ec78f || >=8f500fbc6c655976c8062b1f1e55bd0b3095d6c2 <a6e6ccd5bd07155c2add6c74ce1a5e68ad3b95ea | f7d395dc5008168ac5b9c1ac2791e59a6078cca1, 2dd9304727c7041df0a599595910bdbe02ad03c5, 2becaaeebe230ade1fcd5d0f1cde4d6ee93ec78f, a6e6ccd5bd07155c2add6c74ce1a5e68ad3b95ea |
| Linux/Linuxgeneric | 6.9 | Not reported |
Published upstream
Jul 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.