{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "e568634ae7ac379661c90731d480e067929420a1"
            },
            {
              "fixed": "a616616b938f7922a93e79bef16b4643c57c0922"
            },
            {
              "fixed": "1ae00b6d9a6c82eb3de151d9b04ed59e06cc100f"
            },
            {
              "fixed": "e7e93d3e8c240bdb70c41e79d169d74dfb442843"
            },
            {
              "fixed": "a3f47d7c75ddad1a14621a309286f9fae3cba191"
            },
            {
              "fixed": "ad26c75ae25749313248f06510ebe43b5bf4adcc"
            },
            {
              "fixed": "d21464d93f8ba464dc3d7b4b31c6e0adcd9f659c"
            },
            {
              "fixed": "b6766d7ea43edf5de9d5a572bc58b631d09efe4b"
            },
            {
              "fixed": "f0858bfc7d3cab411a447b88e3ef970e575032c9"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.5.0"
            },
            {
              "fixed": "5.10.265"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.216"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.183"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.148"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.101"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.42"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68326.json"
  },
  "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-\u003eassoc_req_ies = \u0026event-\u003edata[len];\n\tlen = (u8 *)sinfo-\u003eassoc_req_ies - (u8 *)\u0026event-\u003eframe_control;\n\tsinfo-\u003eassoc_req_ies_len = le16_to_cpu(event-\u003elen) - (u16)len;\n\nevent-\u003elen is supplied by the device firmware and is never validated,\nand the subtraction is unchecked.  assoc_req_ies points into\nadapter-\u003eevent_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-\u003elen 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-\u003elen 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-\u003elen 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-\u003elen 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\").",
  "id": "CVE-2026-68326",
  "modified": "2026-08-21T03:30:23.344927280Z",
  "published": "2026-08-10T12:03:02.372Z",
  "references": [
    {
      "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"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68326.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68326"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "wifi: mwifiex: bound uAP association event IEs to the event buffer"
}