{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/mediatek/mt76/mt7996/mac.c",
            "drivers/net/wireless/mediatek/mt76/tx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "06e65d6cf80490bc0457d339595d1ed5a89e8899",
              "status": "affected",
              "version": "7ef0c7ad735b0c38140259519a3f165bee2b857c",
              "versionType": "git"
            },
            {
              "lessThan": "fa0e9aa92a7bc97fc42014c5efaaf1278fa92723",
              "status": "affected",
              "version": "7ef0c7ad735b0c38140259519a3f165bee2b857c",
              "versionType": "git"
            },
            {
              "lessThan": "831074096d0450308357271fc0ffd3f600a2487e",
              "status": "affected",
              "version": "7ef0c7ad735b0c38140259519a3f165bee2b857c",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/mediatek/mt76/mt7996/mac.c",
            "drivers/net/wireless/mediatek/mt76/tx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.18"
            },
            {
              "lessThan": "6.18",
              "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"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.40",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.5",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7996: Fix possible token leak in mt7996_tx_prepare_skb()\n\nIf link_conf or link_sta lookup fails in mt7996_tx_prepare_skb routine,\nmt7996 driver leaks an already allocated tx token. Fix the issue\nreleasing the token in case of error."
        }
      ],
      "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 flaw is in mt7996 TX preparation for EAPOL frames on MLO stations; a nearby WiFi attacker can trigger WPA authentication/rekey traffic that drives this driver TX path on APs, routers, and clients using MediaTek mt7996 hardware.\nAC:L - An attacker can repeatedly initiate or tear down MLO associations and EAPOL exchanges to hit the narrow window where link_conf/link_sta are NULL during TX, reliably leaking tokens without depending on uncontrollable system state.\nPR:N - Exploitation requires only an unauthenticated adjacent WiFi peer initiating or disrupting MLO WPA handshakes that cause EAPOL transmission; no local account, capability, or init-namespace root access is needed on the victim.\nUI:N - No victim user action such as opening files or clicking prompts is required; the attacker alone can generate the authentication traffic needed to reach the vulnerable EAPOL TX path.\nS:U - Impact is confined to the kernel wireless subsystem on the affected host (token exhaustion and potential memory corruption); it does not cross VM, container, or IOMMU security boundaries.\nC:H - Leaked tokens leave stale idr entries pointing at txwi_cache structures that dma.c returns to the free pool, enabling reuse of the same cache while orphaned entries retain dangling skb pointers that can be dereferenced on later token operations.\nI:H - Reusing txwi_cache buffers still referenced by leaked token IDs can corrupt in-flight TX metadata and skb associations, providing a plausible path to controlled memory corruption and kernel code execution beyond simple resource loss.\nA:H - Each leak permanently consumes one of 16384 TX tokens; sustained triggering exhausts the pool, invokes __mt76_set_tx_blocked(), and halts all wireless transmission on the interface, constituting a repeatable denial of service."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:45:53.522Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/06e65d6cf80490bc0457d339595d1ed5a89e8899"
        },
        {
          "url": "https://git.kernel.org/stable/c/fa0e9aa92a7bc97fc42014c5efaaf1278fa92723"
        },
        {
          "url": "https://git.kernel.org/stable/c/831074096d0450308357271fc0ffd3f600a2487e"
        }
      ],
      "title": "wifi: mt76: mt7996: Fix possible token leak in mt7996_tx_prepare_skb()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-74323",
    "datePublished": "2026-08-15T05:58:18.857Z",
    "dateReserved": "2026-08-15T05:44:03.884Z",
    "dateUpdated": "2026-08-17T05:45:53.522Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}