{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-64223",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-64223"
  ],
  "published": "2026-07-24T15:23:26Z",
  "summary": "wifi: mac80211: consume only present negotiated TTLM maps",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: consume only present negotiated TTLM maps\n\nieee80211_tid_to_link_map_size_ok() validates negotiated TTLM elements\nagainst the number of link-map entries indicated by link_map_presence.\nieee80211_parse_neg_ttlm() must consume the same layout.\n\nThe parser advanced its cursor for every TID, including TIDs whose\npresence bit is clear and therefore have no map bytes in the element.\nA sparse map can then make a later present TID read past the validated\nelement.\n\nThe bad bytes land in neg_ttlm->{up,down}link[tid] but are gated by\nvalid_links before being applied to driver state, so a peer cannot\nturn the read into a policy change.  Under KUnit + KASAN with an\nexact-sized element allocation the OOB read is reported as a\nslab-out-of-bounds; whether the same trigger fires under the\nproduction RX path depends on surrounding allocator state.\n\nAdvance the cursor only when the current TID has a map present.",
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            "linux_commit": "95b85bebbedcaedfa7ca79116ed38b7376fba412",
            "upstream_version": "6.18.33",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.18.34"
          }
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    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-64223"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f7d395dc5008168ac5b9c1ac2791e59a6078cca1"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2dd9304727c7041df0a599595910bdbe02ad03c5"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2becaaeebe230ade1fcd5d0f1cde4d6ee93ec78f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a6e6ccd5bd07155c2add6c74ce1a5e68ad3b95ea"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T13:16:28Z"
  }
}