CVE-2026-98186 (GCVE-0-2026-98186)
Vulnerability from cvelistv5
Published
2026-10-06 08:44
Modified
2026-10-19 09:15
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: mwifiex: bound the pairwise-cipher OUI walk to the IE length mwifiex_search_oui_in_ie() reads a pairwise-cipher (PTK) count from a beacon/probe-response RSN or WPA information element and then walks that many 4-byte OUIs, comparing each with memcmp(). The count comes straight from the (attacker-supplied) IE and is never checked against the element's own length, and the callers admit the element on element_id alone (has_ieee_hdr() / has_vendor_hdr(), no length check). A crafted RSN/WPA IE with a large pairwise count therefore makes the walk read up to 255 * 4 bytes past the element -- an out-of-bounds read of the kmemdup()'d beacon buffer, reachable from any AP whose beacon/probe response is processed during scan-result parsing. Pass the number of IE bytes available at the OUI list and bound the walk to the element. Keep the length signed and reject a negative value before any unsigned arithmetic, so a small or zero IE length cannot underflow to a large size_t and defeat the bound. Found by 0sec automated security-research tooling (https://0sec.ai).
References
Impacted products
Vendor Product Version
Linux Linux Version: 5e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4e
Version: 5e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4e
Version: 5e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4e
Version: 5e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4e
Version: 5e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4e
Version: 5e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4e
Version: 5e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4e
Version: 5e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4e
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/marvell/mwifiex/scan.c"
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          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.0"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.271",
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            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.222",
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            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
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              "version": "6.6.158",
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              "lessThanOrEqual": "6.12.*",
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              "version": "6.18.54",
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              "status": "unaffected",
              "version": "7.2.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
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              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mwifiex: bound the pairwise-cipher OUI walk to the IE length\n\nmwifiex_search_oui_in_ie() reads a pairwise-cipher (PTK) count from a\nbeacon/probe-response RSN or WPA information element and then walks that\nmany 4-byte OUIs, comparing each with memcmp(). The count comes straight\nfrom the (attacker-supplied) IE and is never checked against the\nelement\u0027s own length, and the callers admit the element on element_id\nalone (has_ieee_hdr() / has_vendor_hdr(), no length check). A crafted\nRSN/WPA IE with a large pairwise count therefore makes the walk read up\nto 255 * 4 bytes past the element -- an out-of-bounds read of the\nkmemdup()\u0027d beacon buffer, reachable from any AP whose beacon/probe\nresponse is processed during scan-result parsing.\n\nPass the number of IE bytes available at the OUI list and bound the walk\nto the element. Keep the length signed and reject a negative value\nbefore any unsigned arithmetic, so a small or zero IE length cannot\nunderflow to a large size_t and defeat the bound.\n\nFound by 0sec automated security-research tooling (https://0sec.ai)."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:15:17.749Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/77e642af7f2f6029e12a35c847c56cbd0466e799"
        },
        {
          "url": "https://git.kernel.org/stable/c/982b8fcdbb28f63bbbf02f0822c0bbda12ec27ed"
        },
        {
          "url": "https://git.kernel.org/stable/c/58767b41f87244eebaa5a475b9d276c83b89b933"
        },
        {
          "url": "https://git.kernel.org/stable/c/2402c9e2644b7e10c7aaaf87bf12743d7e363559"
        },
        {
          "url": "https://git.kernel.org/stable/c/54a9cc5bd70b0d77a5069d4c46998c679a10c857"
        },
        {
          "url": "https://git.kernel.org/stable/c/8bbef2b1ebfbadc0b9c37bbbf9c9e26fe2e41960"
        },
        {
          "url": "https://git.kernel.org/stable/c/46cda9d42f0d6ec3057d878ddb1f38c0ab9f51df"
        },
        {
          "url": "https://git.kernel.org/stable/c/e667aee1c192d67d27c803007bfa9c6e0873e959"
        }
      ],
      "title": "wifi: mwifiex: bound the pairwise-cipher OUI walk to the IE length",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98186",
    "datePublished": "2026-10-06T08:44:28.429Z",
    "dateReserved": "2026-09-25T10:25:14.323Z",
    "dateUpdated": "2026-10-19T09:15:17.749Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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