{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-74408", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.892Z", "datePublished": "2026-08-15T05:59:16.701Z", "dateUpdated": "2026-08-17T05:46:51.612Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:46:51.612Z" }, "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." } ], "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": "fce041beb03f93c7a771f0b4b6c45bb71ef90901", "lessThan": "a9e055ac62cb3fcea262d4b687ec73eed82b3379", "status": "affected", "versionType": "git" }, { "version": "fce041beb03f93c7a771f0b4b6c45bb71ef90901", "lessThan": "5435fd3edcb11c7cc4002847c83e9a50b49284dc", "status": "affected", "versionType": "git" }, { "version": "fce041beb03f93c7a771f0b4b6c45bb71ef90901", "lessThan": "336d4c8cd9b1646060ee690c881d465dfc09c6c0", "status": "affected", "versionType": "git" }, { "version": "fce041beb03f93c7a771f0b4b6c45bb71ef90901", "lessThan": "7ce2f118a2389e8f0a64068c6fe7cc7d40639be0", "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/ath/ath9k/xmit.c" ], "versions": [ { "version": "3.1", "status": "affected" }, { "version": "0", "lessThan": "3.1", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.261", "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", "versionEndExcluding": "5.10.261" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "5.15.212" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "6.1.178" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "6.6.145" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "6.12.97" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "6.18.40" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "7.1.5" }, { "vulnerable": true, "criteria": "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" } } } }