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EUVD-2026-356184

European Vulnerability Database identifier assigned by ENISA

Reserved

2026-10-02 08:27

Assigner

ENISA

Alias of

a CVE record, shown under related vulnerabilities. This identifier carries no description, severity or references of its own: they belong to that CVE.

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{
  "assigner": "ENISA",
  "date_reserved": "2026-10-02T08:27:53.222453+00:00",
  "id": "EUVD-2026-356184"
}

CVE-2026-68326 (GCVE-0-2026-68326)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:03 – Updated: 2026-08-19 16:33

Title

wifi: mwifiex: bound uAP association event IEs to the event buffer

Summary

In the Linux kernel, the following vulnerability has been resolved: wifi: mwifiex: bound uAP association event IEs to the event buffer mwifiex_process_uap_event() handles EVENT_UAP_STA_ASSOC by exposing the (re)association request IEs that the firmware copies into the event: sinfo->assoc_req_ies = &event->data[len]; len = (u8 *)sinfo->assoc_req_ies - (u8 *)&event->frame_control; sinfo->assoc_req_ies_len = le16_to_cpu(event->len) - (u16)len; event->len is supplied by the device firmware and is never validated, and the subtraction is unchecked. assoc_req_ies points into adapter->event_body[MAX_EVENT_SIZE], a fixed-size array embedded in the kmalloc()'d struct mwifiex_adapter. On the ap_11n_enabled path mwifiex_set_sta_ht_cap() walks these IEs with cfg80211_find_ie(), whose for_each_element() loop dereferences each element header. A firmware-reported event->len larger than the bytes actually received makes assoc_req_ies_len describe IEs that extend past event_body, so the walk reads out of the adapter slab object, a slab-out-of-bounds read (KASAN: slab-out-of-bounds in cfg80211_find_ie). An event->len smaller than the header instead makes the int subtraction negative, which wraps to a huge size_t when stored in assoc_req_ies_len. The same length is handed to cfg80211_new_sta(), so a more modest over-claim can also copy stale event_body bytes into the NL80211_CMD_NEW_STATION notification. A malicious or malfunctioning mwifiex device (USB/SDIO/PCIe) can deliver such an event while the interface is in AP/uAP mode. Validate event->len before use: reject a length that underflows the header or that would place the IEs outside the event_body[] buffer the event was copied into. event->len here is struct mwifiex_assoc_event.len, a payload field internal to this event, not the transport frame length, so it is validated in this handler rather than at the generic MWIFIEX_TYPE_EVENT receive path, which only sees the event cause and the transport frame length. The bound is against event_body[MAX_EVENT_SIZE] rather than the actually-received length because the transports store the event differently (USB and SDIO leave the 4-byte event header in event_skb, PCIe strips it via skb_pull), whereas event_body is the single fixed buffer all of them copy the event into. This is the event-path analogue of the receive-path bounds checks added in commit 119585281617 ("wifi: mwifiex: Fix OOB and integer underflow when rx packets").

Severity

8.8 (High)


                        
                          CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root Scorecard

References

8 references

URL	Tags
https://git.kernel.org/stable/c/a616616b938f7922a…
https://git.kernel.org/stable/c/1ae00b6d9a6c82eb3…
https://git.kernel.org/stable/c/e7e93d3e8c240bdb7…
https://git.kernel.org/stable/c/a3f47d7c75ddad1a1…
https://git.kernel.org/stable/c/ad26c75ae25749313…
https://git.kernel.org/stable/c/d21464d93f8ba464d…
https://git.kernel.org/stable/c/b6766d7ea43edf5de…
https://git.kernel.org/stable/c/f0858bfc7d3cab411…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: e568634ae7ac379661c90731d480e067929420a1 , < a616616b938f7922a93e79bef16b4643c57c0922 (git) Affected: e568634ae7ac379661c90731d480e067929420a1 , < 1ae00b6d9a6c82eb3de151d9b04ed59e06cc100f (git) Affected: e568634ae7ac379661c90731d480e067929420a1 , < e7e93d3e8c240bdb70c41e79d169d74dfb442843 (git) Affected: e568634ae7ac379661c90731d480e067929420a1 , < a3f47d7c75ddad1a14621a309286f9fae3cba191 (git) Affected: e568634ae7ac379661c90731d480e067929420a1 , < ad26c75ae25749313248f06510ebe43b5bf4adcc (git) Affected: e568634ae7ac379661c90731d480e067929420a1 , < d21464d93f8ba464dc3d7b4b31c6e0adcd9f659c (git) Affected: e568634ae7ac379661c90731d480e067929420a1 , < b6766d7ea43edf5de9d5a572bc58b631d09efe4b (git) Affected: e568634ae7ac379661c90731d480e067929420a1 , < f0858bfc7d3cab411a447b88e3ef970e575032c9 (git)
Linux	Linux	Affected: 3.5 Unaffected: 0 , < 3.5 (semver) Unaffected: 5.10.265 , ≤ 5.10.* (semver) Unaffected: 5.15.216 , ≤ 5.15.* (semver) Unaffected: 6.1.183 , ≤ 6.1.* (semver) Unaffected: 6.6.148 , ≤ 6.6.* (semver) Unaffected: 6.12.101 , ≤ 6.12.* (semver) Unaffected: 6.18.42 , ≤ 6.18.* (semver) Unaffected: 7.1.6 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/marvell/mwifiex/uap_event.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a616616b938f7922a93e79bef16b4643c57c0922",
              "status": "affected",
              "version": "e568634ae7ac379661c90731d480e067929420a1",
              "versionType": "git"
            },
            {
              "lessThan": "1ae00b6d9a6c82eb3de151d9b04ed59e06cc100f",
              "status": "affected",
              "version": "e568634ae7ac379661c90731d480e067929420a1",
              "versionType": "git"
            },
            {
              "lessThan": "e7e93d3e8c240bdb70c41e79d169d74dfb442843",
              "status": "affected",
              "version": "e568634ae7ac379661c90731d480e067929420a1",
              "versionType": "git"
            },
            {
              "lessThan": "a3f47d7c75ddad1a14621a309286f9fae3cba191",
              "status": "affected",
              "version": "e568634ae7ac379661c90731d480e067929420a1",
              "versionType": "git"
            },
            {
              "lessThan": "ad26c75ae25749313248f06510ebe43b5bf4adcc",
              "status": "affected",
              "version": "e568634ae7ac379661c90731d480e067929420a1",
              "versionType": "git"
            },
            {
              "lessThan": "d21464d93f8ba464dc3d7b4b31c6e0adcd9f659c",
              "status": "affected",
              "version": "e568634ae7ac379661c90731d480e067929420a1",
              "versionType": "git"
            },
            {
              "lessThan": "b6766d7ea43edf5de9d5a572bc58b631d09efe4b",
              "status": "affected",
              "version": "e568634ae7ac379661c90731d480e067929420a1",
              "versionType": "git"
            },
            {
              "lessThan": "f0858bfc7d3cab411a447b88e3ef970e575032c9",
              "status": "affected",
              "version": "e568634ae7ac379661c90731d480e067929420a1",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/marvell/mwifiex/uap_event.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.5"
            },
            {
              "lessThan": "3.5",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.265",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.148",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.265",
                  "versionStartIncluding": "3.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.216",
                  "versionStartIncluding": "3.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.183",
                  "versionStartIncluding": "3.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.148",
                  "versionStartIncluding": "3.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.101",
                  "versionStartIncluding": "3.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.42",
                  "versionStartIncluding": "3.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.6",
                  "versionStartIncluding": "3.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "3.5",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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()\u0027d 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\")."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:A - The event payload is the firmware\u0027s rendering of an over-the-air (re)association request received by the mwifiex uAP interface, with event-\u003elen being the TLV length covering that frame, so the triggering input comes from a station within 802.11 radio range. This matches the Adjacent treatment used for other frame/event-driven mwifiex defects (CVE-2024-46755, CVE-2023-53226).\nAC:L - No race or attacker-uncontrollable state is involved: the attacker simply sends a crafted/oversized (re)association request to the AP, and the handler parses the resulting EVENT_UAP_STA_ASSOC unconditionally. The only precondition, an mwifiex interface in AP/uAP mode with ap_11n_enabled, is the normal steady state for tethering, Chromebook SoftAP and embedded AP deployments.\nPR:N - EVENT_UAP_STA_ASSOC is generated at association time, before the WPA/EAPOL handshake, so the attacker needs no credentials on or accepted association with the target host. No host user account or capability is involved anywhere on the path.\nUI:N - The event is consumed autonomously by mwifiex_process_uap_event() in the driver\u0027s main work handler as soon as the firmware delivers it; no local user or administrator action is required beyond the AP already running.\nS:U - The out-of-bounds read, the underflowed length and the resulting corruption are all confined to the host kernel\u0027s own security authority within the mwifiex/cfg80211 code; no hypervisor, IOMMU or sandbox boundary is crossed.\nC:H - An over-claimed event-\u003elen makes assoc_req_ies_len describe memory past adapter-\u003eevent_body[MAX_EVENT_SIZE], producing a slab-out-of-bounds read in cfg80211_find_ie() and, worse, causing nla_put() to copy up to tens of kilobytes of adjacent kernel slab memory into the NL80211_CMD_NEW_STATION notification delivered to userspace \u2014 an unbounded kernel heap disclosure, not a few stray bytes.\nI:H - An event-\u003elen below the header makes the int subtraction negative and wrap in size_t; that value reaches nla_put(), where nla_total_size() of the negative length evaluates to 0 and passes the tailroom check, so __nla_put()\u0027s memcpy() runs with the negative length widened to a huge size_t \u2014 an unbounded out-of-bounds write past the netlink skb. Driver 11n/AMSDU state is also set from out-of-bounds data.\nA:H - The commit documents a reproducible KASAN slab-out-of-bounds in cfg80211_find_ie, and the underflow path drives a memcpy of a near-2^64 length that guarantees an immediate kernel panic. The condition can be re-triggered at will by repeating the association attempt."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T16:33:21.015Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a616616b938f7922a93e79bef16b4643c57c0922"
        },
        {
          "url": "https://git.kernel.org/stable/c/1ae00b6d9a6c82eb3de151d9b04ed59e06cc100f"
        },
        {
          "url": "https://git.kernel.org/stable/c/e7e93d3e8c240bdb70c41e79d169d74dfb442843"
        },
        {
          "url": "https://git.kernel.org/stable/c/a3f47d7c75ddad1a14621a309286f9fae3cba191"
        },
        {
          "url": "https://git.kernel.org/stable/c/ad26c75ae25749313248f06510ebe43b5bf4adcc"
        },
        {
          "url": "https://git.kernel.org/stable/c/d21464d93f8ba464dc3d7b4b31c6e0adcd9f659c"
        },
        {
          "url": "https://git.kernel.org/stable/c/b6766d7ea43edf5de9d5a572bc58b631d09efe4b"
        },
        {
          "url": "https://git.kernel.org/stable/c/f0858bfc7d3cab411a447b88e3ef970e575032c9"
        }
      ],
      "title": "wifi: mwifiex: bound uAP association event IEs to the event buffer",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68326",
    "datePublished": "2026-08-10T12:03:02.372Z",
    "dateReserved": "2026-07-30T09:28:09.382Z",
    "dateUpdated": "2026-08-19T16:33:21.015Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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EUVD-2026-356184

CVE-2026-68326 (GCVE-0-2026-68326)

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