{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74323", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.884Z", "datePublished": "2026-08-15T05:58:18.857Z", "dateUpdated": "2026-08-17T05:45:53.522Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:45:53.522Z"}, "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": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH"}, "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."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/wireless/mediatek/mt76/mt7996/mac.c", "drivers/net/wireless/mediatek/mt76/tx.c"], "versions": [{"version": "7ef0c7ad735b0c38140259519a3f165bee2b857c", "lessThan": "06e65d6cf80490bc0457d339595d1ed5a89e8899", "status": "affected", "versionType": "git"}, {"version": "7ef0c7ad735b0c38140259519a3f165bee2b857c", "lessThan": "fa0e9aa92a7bc97fc42014c5efaaf1278fa92723", "status": "affected", "versionType": "git"}, {"version": "7ef0c7ad735b0c38140259519a3f165bee2b857c", "lessThan": "831074096d0450308357271fc0ffd3f600a2487e", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/wireless/mediatek/mt76/mt7996/mac.c", "drivers/net/wireless/mediatek/mt76/tx.c"], "versions": [{"version": "6.18", "status": "affected"}, {"version": "0", "lessThan": "6.18", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "7.2"}]}]}], "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"}}}}

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{"affected": [{"affectedData": [{"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"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}], "id": "CVE-2026-74323", "lastModified": "2026-08-17T06:19:26.740", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-08-15T06:22:32.877", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/06e65d6cf80490bc0457d339595d1ed5a89e8899"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/831074096d0450308357271fc0ffd3f600a2487e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fa0e9aa92a7bc97fc42014c5efaaf1278fa92723"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}