CVE-2026-68326: Software Security Vulnerability Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-2q54-jxw8-pqqr",
  "modified" : "2026-08-19T18:32:14Z",
  "published" : "2026-08-10T15:33:46Z",
  "aliases" : [ "CVE-2026-68326" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mwifiex: bound uAP association event IEs to the event buffer\n\nmwifiex_process_uap_event() handles EVENT_UAP_STA_ASSOC by exposing the\n(re)association request IEs that the firmware copies into the event:\n\n\tsinfo->assoc_req_ies = &event->data[len];\n\tlen = (u8 *)sinfo->assoc_req_ies - (u8 *)&event->frame_control;\n\tsinfo->assoc_req_ies_len = le16_to_cpu(event->len) - (u16)len;\n\nevent->len is supplied by the device firmware and is never validated,\nand the subtraction is unchecked.  assoc_req_ies points into\nadapter->event_body[MAX_EVENT_SIZE], a fixed-size array embedded in the\nkmalloc()'d struct mwifiex_adapter.\n\nOn the ap_11n_enabled path mwifiex_set_sta_ht_cap() walks these IEs with\ncfg80211_find_ie(), whose for_each_element() loop dereferences each\nelement header.  A firmware-reported event->len larger than the bytes\nactually received makes assoc_req_ies_len describe IEs that extend past\nevent_body, so the walk reads out of the adapter slab object, a\nslab-out-of-bounds read (KASAN: slab-out-of-bounds in cfg80211_find_ie).\nAn event->len smaller than the header instead makes the int subtraction\nnegative, which wraps to a huge size_t when stored in assoc_req_ies_len.\nThe same length is handed to cfg80211_new_sta(), so a more modest\nover-claim can also copy stale event_body bytes into the\nNL80211_CMD_NEW_STATION notification.\n\nA malicious or malfunctioning mwifiex device (USB/SDIO/PCIe) can deliver\nsuch an event while the interface is in AP/uAP mode.\n\nValidate event->len before use: reject a length that underflows the\nheader or that would place the IEs outside the event_body[] buffer the\nevent was copied into.  event->len here is struct mwifiex_assoc_event.len,\na payload field internal to this event, not the transport frame length,\nso it is validated in this handler rather than at the generic\nMWIFIEX_TYPE_EVENT receive path, which only sees the event cause and the\ntransport frame length.  The bound is against event_body[MAX_EVENT_SIZE]\nrather than the actually-received length because the transports store the\nevent differently (USB and SDIO leave the 4-byte event header in\nevent_skb, PCIe strips it via skb_pull), whereas event_body is the single\nfixed buffer all of them copy the event into.  This is the event-path\nanalogue of the receive-path bounds checks added in commit 119585281617\n(\"wifi: mwifiex: Fix OOB and integer underflow when rx packets\").",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-68326"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/1ae00b6d9a6c82eb3de151d9b04ed59e06cc100f"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/a3f47d7c75ddad1a14621a309286f9fae3cba191"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/a616616b938f7922a93e79bef16b4643c57c0922"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/ad26c75ae25749313248f06510ebe43b5bf4adcc"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/b6766d7ea43edf5de9d5a572bc58b631d09efe4b"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/d21464d93f8ba464dc3d7b4b31c6e0adcd9f659c"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/e7e93d3e8c240bdb70c41e79d169d74dfb442843"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/f0858bfc7d3cab411a447b88e3ef970e575032c9"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-125" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-10T13:20:22Z"
  }
}