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FKIE_CVE-2026-68472

Vulnerability from fkie_nvd - Published: 2026-08-15 06:20 - Updated: 2026-08-17 06:17
Severity
8.1 (High) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: validate EHT MLE before MLD ID read cfg80211_gen_new_ie() copies ML probe response elements from the parent frame when the parent EHT multi-link element has an MLD ID matching the nontransmitted BSSID index. The code only checked that the extension element had more than one byte before calling ieee80211_mle_get_mld_id(). That helper assumes a BASIC MLE with enough common info and documents that callers must first use ieee80211_mle_type_ok(). Attack chain: malicious AP sends a short EHT MLE in an MBSSID beacon. cfg80211_inform_bss_frame_data() stores the copied IE buffer. cfg80211_parse_mbssid_data() builds the nontransmitted BSS IE. cfg80211_gen_new_ie() sees the EHT MLE in the parent frame. ieee80211_mle_get_mld_id() then reads past the IE boundary. Validate the MLE type and size before reading the MLD ID. This matches the contract required by the MLE helper and rejects the short element before any internal MLE fields are accessed.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3b0505e43da8fb5b2a7994c3c3604e5a74692154
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/584657c5fc58d7a840623a2fa06331c9661dd0f1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/74e27cd1d98b546fdb276008a83708d062339661
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/wireless/scan.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "584657c5fc58d7a840623a2fa06331c9661dd0f1",
              "status": "affected",
              "version": "61dcfa8c2a8f6c53ce77b2c832b82990754b2aa9",
              "versionType": "git"
            },
            {
              "lessThan": "3b0505e43da8fb5b2a7994c3c3604e5a74692154",
              "status": "affected",
              "version": "61dcfa8c2a8f6c53ce77b2c832b82990754b2aa9",
              "versionType": "git"
            },
            {
              "lessThan": "74e27cd1d98b546fdb276008a83708d062339661",
              "status": "affected",
              "version": "61dcfa8c2a8f6c53ce77b2c832b82990754b2aa9",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/wireless/scan.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.14"
            },
            {
              "lessThan": "6.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: cfg80211: validate EHT MLE before MLD ID read\n\ncfg80211_gen_new_ie() copies ML probe response elements from\nthe parent frame when the parent EHT multi-link element has an\nMLD ID matching the nontransmitted BSSID index.\n\nThe code only checked that the extension element had more than\none byte before calling ieee80211_mle_get_mld_id(). That helper\nassumes a BASIC MLE with enough common info and documents that\ncallers must first use ieee80211_mle_type_ok().\n\nAttack chain:\nmalicious AP sends a short EHT MLE in an MBSSID beacon.\ncfg80211_inform_bss_frame_data() stores the copied IE buffer.\ncfg80211_parse_mbssid_data() builds the nontransmitted BSS IE.\ncfg80211_gen_new_ie() sees the EHT MLE in the parent frame.\nieee80211_mle_get_mld_id() then reads past the IE boundary.\n\nValidate the MLE type and size before reading the MLD ID. This\nmatches the contract required by the MLE helper and rejects the\nshort element before any internal MLE fields are accessed."
    }
  ],
  "id": "CVE-2026-68472",
  "lastModified": "2026-08-17T06:17:56.620",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "ADJACENT_NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.2,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-08-15T06:20:05.570",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3b0505e43da8fb5b2a7994c3c3604e5a74692154"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/584657c5fc58d7a840623a2fa06331c9661dd0f1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/74e27cd1d98b546fdb276008a83708d062339661"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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