{"id":"CVE-2026-74408","state":"PUBLISHED","title":"wifi: ath9k: fix OOB access from firmware tx status queue ID","description":"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.","publishedAt":"2026-08-15T05:59:16.701Z","updatedAt":"2026-10-16T19:05:43.633Z","severity":{"score":8.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"fce041beb03f93c7a771f0b4b6c45bb71ef90901","status":"affected","lessThan":"fb11083db9d7d6fb8f98bbba1cbfcf3fb7b4bf54","versionType":"git"},{"version":"fce041beb03f93c7a771f0b4b6c45bb71ef90901","status":"affected","lessThan":"734db72d55ca578a344dfa33e30145032c074b25","versionType":"git"},{"version":"fce041beb03f93c7a771f0b4b6c45bb71ef90901","status":"affected","lessThan":"f5931d06b45ed402572bfe5832fff15864ef5481","versionType":"git"},{"version":"fce041beb03f93c7a771f0b4b6c45bb71ef90901","status":"affected","lessThan":"46ca1451f61b598f45cb5259e066d305444d95fc","versionType":"git"},{"version":"fce041beb03f93c7a771f0b4b6c45bb71ef90901","status":"affected","lessThan":"a9e055ac62cb3fcea262d4b687ec73eed82b3379","versionType":"git"},{"version":"fce041beb03f93c7a771f0b4b6c45bb71ef90901","status":"affected","lessThan":"5435fd3edcb11c7cc4002847c83e9a50b49284dc","versionType":"git"},{"version":"fce041beb03f93c7a771f0b4b6c45bb71ef90901","status":"affected","lessThan":"336d4c8cd9b1646060ee690c881d465dfc09c6c0","versionType":"git"},{"version":"fce041beb03f93c7a771f0b4b6c45bb71ef90901","status":"affected","lessThan":"7ce2f118a2389e8f0a64068c6fe7cc7d40639be0","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/ath/ath9k/xmit.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.1","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.1","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/ath/ath9k/xmit.c"]}],"references":["https://git.kernel.org/stable/c/fb11083db9d7d6fb8f98bbba1cbfcf3fb7b4bf54","https://git.kernel.org/stable/c/734db72d55ca578a344dfa33e30145032c074b25","https://git.kernel.org/stable/c/f5931d06b45ed402572bfe5832fff15864ef5481","https://git.kernel.org/stable/c/46ca1451f61b598f45cb5259e066d305444d95fc","https://git.kernel.org/stable/c/a9e055ac62cb3fcea262d4b687ec73eed82b3379","https://git.kernel.org/stable/c/5435fd3edcb11c7cc4002847c83e9a50b49284dc","https://git.kernel.org/stable/c/336d4c8cd9b1646060ee690c881d465dfc09c6c0","https://git.kernel.org/stable/c/7ce2f118a2389e8f0a64068c6fe7cc7d40639be0"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/74xxx/CVE-2026-74408.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-74408","state":"PUBLISHED","datePublished":"2026-08-15T05:59:16.701Z","dateUpdated":"2026-10-16T19:05:43.633Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-15T05:44:03.892Z"},"containers":{"cna":{"title":"wifi: ath9k: fix OOB access from firmware tx status queue ID","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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"fce041beb03f93c7a771f0b4b6c45bb71ef90901","status":"affected","lessThan":"fb11083db9d7d6fb8f98bbba1cbfcf3fb7b4bf54","versionType":"git"},{"version":"fce041beb03f93c7a771f0b4b6c45bb71ef90901","status":"affected","lessThan":"734db72d55ca578a344dfa33e30145032c074b25","versionType":"git"},{"version":"fce041beb03f93c7a771f0b4b6c45bb71ef90901","status":"affected","lessThan":"f5931d06b45ed402572bfe5832fff15864ef5481","versionType":"git"},{"version":"fce041beb03f93c7a771f0b4b6c45bb71ef90901","status":"affected","lessThan":"46ca1451f61b598f45cb5259e066d305444d95fc","versionType":"git"},{"version":"fce041beb03f93c7a771f0b4b6c45bb71ef90901","status":"affected","lessThan":"a9e055ac62cb3fcea262d4b687ec73eed82b3379","versionType":"git"},{"version":"fce041beb03f93c7a771f0b4b6c45bb71ef90901","status":"affected","lessThan":"5435fd3edcb11c7cc4002847c83e9a50b49284dc","versionType":"git"},{"version":"fce041beb03f93c7a771f0b4b6c45bb71ef90901","status":"affected","lessThan":"336d4c8cd9b1646060ee690c881d465dfc09c6c0","versionType":"git"},{"version":"fce041beb03f93c7a771f0b4b6c45bb71ef90901","status":"affected","lessThan":"7ce2f118a2389e8f0a64068c6fe7cc7d40639be0","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/ath/ath9k/xmit.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.1","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.1","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/ath/ath9k/xmit.c"]}],"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"}],"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."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T05:46:51.612Z"},"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"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-74408","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-10-16T18:55:57.152844Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-16T19:05:43.633Z"}}]}}}