CVE-2026-98184 (GCVE-0-2026-98184)

Vulnerability from cvelistv5 – Published: 2026-10-06 08:44 – Updated: 2026-10-06 08:44
VLAI
Title
wifi: mwifiex: prevent authentication frame length truncation
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: mwifiex: prevent authentication frame length truncation mwifiex_cfg80211_authenticate() derives the authentication frame length from req->ie_len and req->auth_data_len, both of type size_t, but stores it in a u16. NL80211_ATTR_AUTH_DATA only has a minimum length policy. Since nla_len is a u16, a single attribute can carry up to 65531 bytes of payload, so the sum can exceed U16_MAX before it is assigned to pkt_len. The truncated pkt_len determines the skb frame area, while the copy length remains req->auth_data_len - 4, resulting in a heap buffer overflow. For example, with auth_data_len equal to 65510 and no IEs, the sum is 65546. It is truncated to 10 and then reduced by four to 6. The driver appends only six bytes to the skb with skb_put(), but then copies 65506 user-provided bytes into the authentication body. Reaching this path requires CAP_NET_ADMIN in the user namespace owning the network namespace, an up station netdev, and a suitable BSS/SAE authentication request. Compute the length in size_t, reject values that cannot be represented by the firmware's u16 frame length field, and only then assign it to pkt_len.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 54/100 over 6633 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 36995892c271cce5e2230bc165a06f109b117222 , < 25c45a2075cc00faed45f92a64bb172fb074a2ee (git)
Affected: 36995892c271cce5e2230bc165a06f109b117222 , < 5747eaa38a7fcad48be2fd910b65008198b2b06c (git)
Affected: 36995892c271cce5e2230bc165a06f109b117222 , < 877b61a67d5eb3e616478daf3908114b57feff1e (git)
Affected: 36995892c271cce5e2230bc165a06f109b117222 , < fa00193eb991f92b007aefe7afb6a7566976dacf (git)
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Linux Linux Affected: 6.12
Unaffected: 0 , < 6.12 (semver)
Unaffected: 6.12.112 , ≤ 6.12.* (semver)
Unaffected: 6.18.54 , ≤ 6.18.* (semver)
Unaffected: 7.2.8 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc4 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/marvell/mwifiex/cfg80211.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "versionType": "semver"
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              "operator": "OR"
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mwifiex: prevent authentication frame length truncation\n\nmwifiex_cfg80211_authenticate() derives the authentication frame length\nfrom req-\u003eie_len and req-\u003eauth_data_len, both of type size_t, but stores\nit in a u16.\n\nNL80211_ATTR_AUTH_DATA only has a minimum length policy. Since nla_len is\na u16, a single attribute can carry up to 65531 bytes of payload, so the\nsum can exceed U16_MAX before it is assigned to pkt_len. The truncated\npkt_len determines the skb frame area, while the copy length remains\nreq-\u003eauth_data_len - 4, resulting in a heap buffer overflow.\n\nFor example, with auth_data_len equal to 65510 and no IEs, the sum is\n65546. It is truncated to 10 and then reduced by four to 6. The driver\nappends only six bytes to the skb with skb_put(), but then copies 65506\nuser-provided bytes into the authentication body.\n\nReaching this path requires CAP_NET_ADMIN in the user namespace owning\nthe network namespace, an up station netdev, and a suitable BSS/SAE\nauthentication request.\n\nCompute the length in size_t, reject values that cannot be represented by\nthe firmware\u0027s u16 frame length field, and only then assign it to pkt_len."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-06T08:44:26.836Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/25c45a2075cc00faed45f92a64bb172fb074a2ee"
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          "url": "https://git.kernel.org/stable/c/5747eaa38a7fcad48be2fd910b65008198b2b06c"
        },
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        },
        {
          "url": "https://git.kernel.org/stable/c/fa00193eb991f92b007aefe7afb6a7566976dacf"
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      "title": "wifi: mwifiex: prevent authentication frame length truncation",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98184",
    "datePublished": "2026-10-06T08:44:26.836Z",
    "dateReserved": "2026-09-25T10:25:14.323Z",
    "dateUpdated": "2026-10-06T08:44:26.836Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "date": "2026-10-09",
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      "percentile": "0.11745"
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    "nvd": {
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                "programFiles": [
                  "drivers/net/wireless/marvell/mwifiex/cfg80211.c"
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        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mwifiex: prevent authentication frame length truncation\n\nmwifiex_cfg80211_authenticate() derives the authentication frame length\nfrom req-\u003eie_len and req-\u003eauth_data_len, both of type size_t, but stores\nit in a u16.\n\nNL80211_ATTR_AUTH_DATA only has a minimum length policy. Since nla_len is\na u16, a single attribute can carry up to 65531 bytes of payload, so the\nsum can exceed U16_MAX before it is assigned to pkt_len. The truncated\npkt_len determines the skb frame area, while the copy length remains\nreq-\u003eauth_data_len - 4, resulting in a heap buffer overflow.\n\nFor example, with auth_data_len equal to 65510 and no IEs, the sum is\n65546. It is truncated to 10 and then reduced by four to 6. The driver\nappends only six bytes to the skb with skb_put(), but then copies 65506\nuser-provided bytes into the authentication body.\n\nReaching this path requires CAP_NET_ADMIN in the user namespace owning\nthe network namespace, an up station netdev, and a suitable BSS/SAE\nauthentication request.\n\nCompute the length in size_t, reject values that cannot be represented by\nthe firmware\u0027s u16 frame length field, and only then assign it to pkt_len."
          }
        ],
        "id": "CVE-2026-98184",
        "lastModified": "2026-10-06T09:18:03.233",
        "metrics": {},
        "published": "2026-10-06T09:18:03.233",
        "references": [
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            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      "current_release_date": "2026-10-08T22:18:34+00:00",
      "cve": "CVE-2026-98184",
      "id": "CVE-2026-98184",
      "initial_release_date": "2026-10-06T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "93",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: wifi: mwifiex: prevent authentication frame length truncation",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98184.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-10-08T16:51:14Z",
      "cve": "CVE-2026-98184",
      "id": "CVE-2026-98184",
      "initial_release_date": "2026-10-08T16:51:14Z",
      "product_status:known_not_affected": "347",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-98184",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-98184.json",
      "version": "2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.