CVE-2026-74408

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A qid >= 10 causes an OOB array\naccess.\n\nAdd a bounds check on ts.qid before using it as an array index."}], "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 - Exploitation requires sending 802.11 frames over WiFi to a victim using an EDMA-capable ath9k device (routers, embedded APs, laptops); TX completion interrupts from that traffic reach ath_tx_edma_tasklet() via ath_isr/ath9k_interrupt.\nAC:L - An adjacent attacker can repeatedly induce TX completions and error/status conditions with crafted or high-volume 802.11 traffic; they control timing and load on both sides of the race, making invalid firmware qid values (10-15) reachable without conditions outside attacker influence.\nPR:N - No local account or kernel privileges are required; unauthenticated adjacent WiFi frames (probes, data, deauth/flood) cause the victim radio to transmit and process firmware TX status reports on the interrupt path.\nUI:N - No victim interaction is needed beyond the device having WiFi active, which is the normal operating state for routers, phones, and IoT APs using ath9k hardware.\nS:U - Impact is confined to kernel memory corruption and privilege escalation or denial of service on the affected host; it does not cross VM, container, or IOMMU security boundaries.\nC:H - Out-of-bounds indexing of sc->tx.txq[ts.qid] reads adjacent ath_softc/ath_tx fields as struct ath_txq (spinlocks, list heads, DMA metadata), constituting an unbounded OOB kernel memory read exploitable for information disclosure.\nI:H - The OOB txq pointer is dereferenced for spin_lock_bh, list_head manipulation, and ath_tx_process_buffer(), writing through misaligned kernel structures and enabling heap corruption and potential arbitrary code execution.\nA:H - Locking and list operations on memory interpreted as the wrong ath_txq can cause kernel oops, panic, or hang, and repeated adjacent triggering can sustain denial of service on the wireless host."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/wireless/ath/ath9k/xmit.c"], "versions": [{"version": "fce041beb03f93c7a771f0b4b6c45bb71ef90901", "lessThan": "fb11083db9d7d6fb8f98bbba1cbfcf3fb7b4bf54", "status": "affected", "versionType": "git"}, {"version": "fce041beb03f93c7a771f0b4b6c45bb71ef90901", "lessThan": "734db72d55ca578a344dfa33e30145032c074b25", "status": "affected", "versionType": "git"}, {"version": "fce041beb03f93c7a771f0b4b6c45bb71ef90901", "lessThan": "f5931d06b45ed402572bfe5832fff15864ef5481", "status": "affected", "versionType": "git"}, {"version": "fce041beb03f93c7a771f0b4b6c45bb71ef90901", "lessThan": "46ca1451f61b598f45cb5259e066d305444d95fc", "status": "affected", "versionType": "git"}, {"version": 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"lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.97", "lessThanOrEqual": "6.12.*", "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": "3.1", 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"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/fb11083db9d7d6fb8f98bbba1cbfcf3fb7b4bf54"}, {"url": "https://git.kernel.org/stable/c/734db72d55ca578a344dfa33e30145032c074b25"}, {"url": "https://git.kernel.org/stable/c/f5931d06b45ed402572bfe5832fff15864ef5481"}, {"url": "https://git.kernel.org/stable/c/46ca1451f61b598f45cb5259e066d305444d95fc"}, {"url": "https://git.kernel.org/stable/c/a9e055ac62cb3fcea262d4b687ec73eed82b3379"}, {"url": "https://git.kernel.org/stable/c/5435fd3edcb11c7cc4002847c83e9a50b49284dc"}, {"url": "https://git.kernel.org/stable/c/336d4c8cd9b1646060ee690c881d465dfc09c6c0"}, {"url": "https://git.kernel.org/stable/c/7ce2f118a2389e8f0a64068c6fe7cc7d40639be0"}], "title": "wifi: ath9k: fix OOB access from firmware tx status queue ID", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": 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An adjacent attacker can repeatedly induce TX completions and error/status conditions with crafted or high-volume 802.11 traffic; they control timing and load on both sides of the race, making invalid firmware qid values (10-15) reachable without conditions outside attacker influence.\nPR:N - No local account or kernel privileges are required; unauthenticated adjacent WiFi frames (probes, data, deauth/flood) cause the victim radio to transmit and process firmware TX status reports on the interrupt path.\nUI:N - No victim interaction is needed beyond the device having WiFi active, which is the normal operating state for routers, phones, and IoT APs using ath9k hardware.\nS:U - Impact is confined to kernel memory corruption and privilege escalation or denial of service on the affected host; it does not cross VM, container, or IOMMU security boundaries.\nC:H - Out-of-bounds indexing of sc->tx.txq[ts.qid] reads adjacent ath_softc/ath_tx fields as struct ath_txq (spinlocks, list heads, DMA metadata), constituting an unbounded OOB kernel memory read exploitable for information disclosure.\nI:H - The OOB txq pointer is dereferenced for spin_lock_bh, list_head manipulation, and ath_tx_process_buffer(), writing through misaligned kernel structures and enabling heap corruption and potential arbitrary code execution.\nA:H - Locking and list operations on memory interpreted as the wrong ath_txq can cause kernel oops, panic, or hang, and repeated adjacent triggering can sustain denial of service on the wireless host."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "fce041beb03f93c7a771f0b4b6c45bb71ef90901", "lessThan": "fb11083db9d7d6fb8f98bbba1cbfcf3fb7b4bf54", "versionType": "git"}, {"status": "affected", "version": "fce041beb03f93c7a771f0b4b6c45bb71ef90901", "lessThan": "734db72d55ca578a344dfa33e30145032c074b25", "versionType": "git"}, {"status": "affected", "version": "fce041beb03f93c7a771f0b4b6c45bb71ef90901", "lessThan": "f5931d06b45ed402572bfe5832fff15864ef5481", "versionType": "git"}, {"status": "affected", "version": "fce041beb03f93c7a771f0b4b6c45bb71ef90901", "lessThan": "46ca1451f61b598f45cb5259e066d305444d95fc", "versionType": "git"}, {"status": "affected", "version": "fce041beb03f93c7a771f0b4b6c45bb71ef90901", "lessThan": "a9e055ac62cb3fcea262d4b687ec73eed82b3379", "versionType": "git"}, {"status": "affected", "version": "fce041beb03f93c7a771f0b4b6c45bb71ef90901", "lessThan": "5435fd3edcb11c7cc4002847c83e9a50b49284dc", "versionType": "git"}, {"status": "affected", "version": "fce041beb03f93c7a771f0b4b6c45bb71ef90901", "lessThan": "336d4c8cd9b1646060ee690c881d465dfc09c6c0", "versionType": "git"}, {"status": "affected", "version": "fce041beb03f93c7a771f0b4b6c45bb71ef90901", "lessThan": "7ce2f118a2389e8f0a64068c6fe7cc7d40639be0", "versionType": "git"}], "programFiles": ["drivers/net/wireless/ath/ath9k/xmit.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "3.1"}, {"status": "unaffected", "version": "0", "lessThan": "3.1", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.261", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.212", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.178", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.145", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.97", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.40", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.5", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/net/wireless/ath/ath9k/xmit.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/fb11083db9d7d6fb8f98bbba1cbfcf3fb7b4bf54"}, {"url": "https://git.kernel.org/stable/c/734db72d55ca578a344dfa33e30145032c074b25"}, {"url": "https://git.kernel.org/stable/c/f5931d06b45ed402572bfe5832fff15864ef5481"}, {"url": "https://git.kernel.org/stable/c/46ca1451f61b598f45cb5259e066d305444d95fc"}, {"url": "https://git.kernel.org/stable/c/a9e055ac62cb3fcea262d4b687ec73eed82b3379"}, {"url": "https://git.kernel.org/stable/c/5435fd3edcb11c7cc4002847c83e9a50b49284dc"}, {"url": "https://git.kernel.org/stable/c/336d4c8cd9b1646060ee690c881d465dfc09c6c0"}, {"url": "https://git.kernel.org/stable/c/7ce2f118a2389e8f0a64068c6fe7cc7d40639be0"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath9k: fix OOB access from firmware tx status queue ID\n\nath_tx_edma_tasklet() accesses sc->tx.txq[ts.qid] where ts.qid is a\n4-bit hardware field (0-15), but the txq array only has\nATH9K_NUM_TX_QUEUES (10) entries. A qid >= 10 causes an OOB array\naccess.\n\nAdd a bounds check on ts.qid before using it as an array index."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.261", "versionStartIncluding": "3.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.212", "versionStartIncluding": "3.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.178", "versionStartIncluding": "3.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.145", "versionStartIncluding": "3.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.97", "versionStartIncluding": "3.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.40", "versionStartIncluding": "3.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1.5", "versionStartIncluding": "3.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.2", "versionStartIncluding": "3.1"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:46:51.612Z"}}}, "cveMetadata": {"cveId": "CVE-2026-74408", "state": "PUBLISHED", "dateUpdated": "2026-10-16T19:05:43.633Z", "dateReserved": "2026-08-15T05:44:03.892Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-08-15T05:59:16.701Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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A qid >= 10 causes an OOB array\naccess.\n\nAdd a bounds check on ts.qid before using it as an array index."}], "id": "CVE-2026-74408", "lastModified": "2026-10-16T20:17:26.257", "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"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-74408", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T18:55:57.152844Z", "version": "2.0.3"}}]}, "published": "2026-08-15T06:22:42.837", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/336d4c8cd9b1646060ee690c881d465dfc09c6c0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/46ca1451f61b598f45cb5259e066d305444d95fc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5435fd3edcb11c7cc4002847c83e9a50b49284dc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/734db72d55ca578a344dfa33e30145032c074b25"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7ce2f118a2389e8f0a64068c6fe7cc7d40639be0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a9e055ac62cb3fcea262d4b687ec73eed82b3379"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f5931d06b45ed402572bfe5832fff15864ef5481"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fb11083db9d7d6fb8f98bbba1cbfcf3fb7b4bf54"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: wifi: ath9k: fix OOB access from firmware tx status queue ID", "id": "2516901", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516901"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nwifi: ath9k: fix OOB access from firmware tx status queue ID\nath_tx_edma_tasklet() accesses sc->tx.txq[ts.qid] where ts.qid is a\n4-bit hardware field (0-15), but the txq array only has\nATH9K_NUM_TX_QUEUES (10) entries. A qid >= 10 causes an OOB array\naccess.\nAdd a bounds check on ts.qid before using it as an array index.", "A flaw was found in the Linux kernel's ath9k Wi-Fi driver. This vulnerability arises from an out-of-bounds memory access within the `ath_tx_edma_tasklet()` function. An internal queue identifier, which is a 4-bit hardware field, can exceed the bounds of the transmit queue array. This can lead to memory corruption, potentially allowing a local attacker to cause a denial of service or, in more severe cases, execute arbitrary code."], "name": "CVE-2026-74408", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-74408\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74408\nhttps://lore.kernel.org/linux-cve-announce/2026081510-CVE-2026-74408-09af@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[fce041beb03f93c7a771f0b4b6c45bb71ef90901,fb11083db9d7d6fb8f98bbba1cbfcf3fb7b4bf54)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[fce041beb03f93c7a771f0b4b6c45bb71ef90901,734db72d55ca578a344dfa33e30145032c074b25)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[fce041beb03f93c7a771f0b4b6c45bb71ef90901,f5931d06b45ed402572bfe5832fff15864ef5481)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[fce041beb03f93c7a771f0b4b6c45bb71ef90901,46ca1451f61b598f45cb5259e066d305444d95fc)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[fce041beb03f93c7a771f0b4b6c45bb71ef90901,a9e055ac62cb3fcea262d4b687ec73eed82b3379)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[fce041beb03f93c7a771f0b4b6c45bb71ef90901,5435fd3edcb11c7cc4002847c83e9a50b49284dc)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[fce041beb03f93c7a771f0b4b6c45bb71ef90901,336d4c8cd9b1646060ee690c881d465dfc09c6c0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[fce041beb03f93c7a771f0b4b6c45bb71ef90901,7ce2f118a2389e8f0a64068c6fe7cc7d40639be0)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "3.1"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,3.1)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.261,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.212,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.178,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.145,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.97,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-15T13:15:03.216773+00:00", "updated": "2026-08-21T23:45:03.449399+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-119", "CWE-787"]}