{"id":"CVE-2026-68199","state":"PUBLISHED","title":"wifi: ath6kl: fix OOB access from firmware ADDBA window size","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath6kl: fix OOB access from firmware ADDBA window size\n\naggr_recv_addba_req_evt() logs a debug message when the firmware-supplied\nwin_sz is outside [AGGR_WIN_SZ_MIN, AGGR_WIN_SZ_MAX] but does not\nreturn. The out-of-range win_sz is then used in TID_WINDOW_SZ() to\ncompute a kzalloc size and stored in rxtid->hold_q_sz, leading to\nzero-size or overflowed allocations and subsequent out-of-bounds access.\n\nClean up any previously active aggregation session for the TID first,\nthen return early when win_sz is out of the valid range, instead of\nproceeding with a broken allocation size.","publishedAt":"2026-08-10T12:00:18.278Z","updatedAt":"2026-10-19T20:58:56.656Z","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":"bdcd81707973cf8aa9305337166f8ee842a050d4","status":"affected","lessThan":"c8e3ca7954d8233fbc54bd370c1827670f43c538","versionType":"git"},{"version":"bdcd81707973cf8aa9305337166f8ee842a050d4","status":"affected","lessThan":"f480d9910fcfe326db3a6281df80e83af347193e","versionType":"git"},{"version":"bdcd81707973cf8aa9305337166f8ee842a050d4","status":"affected","lessThan":"67bc9af4f41f2bdba20404fbd753b2a1bd6dd352","versionType":"git"},{"version":"bdcd81707973cf8aa9305337166f8ee842a050d4","status":"affected","lessThan":"d4558c140782180e2c80a7588a4af9f8675adfc4","versionType":"git"},{"version":"bdcd81707973cf8aa9305337166f8ee842a050d4","status":"affected","lessThan":"5a65fd4722416061698b0a3277222381efbc4882","versionType":"git"},{"version":"bdcd81707973cf8aa9305337166f8ee842a050d4","status":"affected","lessThan":"58c6c8dc2e022e1b4f3dc58725a1ca49ff470f9c","versionType":"git"},{"version":"bdcd81707973cf8aa9305337166f8ee842a050d4","status":"affected","lessThan":"cec0a487cf38ac1f9bca240ffe8a94c5014b72f2","versionType":"git"},{"version":"bdcd81707973cf8aa9305337166f8ee842a050d4","status":"affected","lessThan":"44126b6994eeb28f2103b638e698f40a1244f327","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/ath/ath6kl/txrx.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.2","versionType":"semver"},{"version":"5.10.265","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.216","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.183","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.148","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.101","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.42","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.6","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/ath6kl/txrx.c"]}],"references":["https://git.kernel.org/stable/c/c8e3ca7954d8233fbc54bd370c1827670f43c538","https://git.kernel.org/stable/c/f480d9910fcfe326db3a6281df80e83af347193e","https://git.kernel.org/stable/c/67bc9af4f41f2bdba20404fbd753b2a1bd6dd352","https://git.kernel.org/stable/c/d4558c140782180e2c80a7588a4af9f8675adfc4","https://git.kernel.org/stable/c/5a65fd4722416061698b0a3277222381efbc4882","https://git.kernel.org/stable/c/58c6c8dc2e022e1b4f3dc58725a1ca49ff470f9c","https://git.kernel.org/stable/c/cec0a487cf38ac1f9bca240ffe8a94c5014b72f2","https://git.kernel.org/stable/c/44126b6994eeb28f2103b638e698f40a1244f327"],"weaknesses":["CWE-20"],"ingestedAt":"2026-10-29T20:12:49.727Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/68xxx/CVE-2026-68199.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-68199","state":"PUBLISHED","datePublished":"2026-08-10T12:00:18.278Z","dateUpdated":"2026-10-19T20:58:56.656Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-30T09:28:09.374Z"},"containers":{"cna":{"title":"wifi: ath6kl: fix OOB access from firmware ADDBA window size","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath6kl: fix OOB access from firmware ADDBA window size\n\naggr_recv_addba_req_evt() logs a debug message when the firmware-supplied\nwin_sz is outside [AGGR_WIN_SZ_MIN, AGGR_WIN_SZ_MAX] but does not\nreturn. The out-of-range win_sz is then used in TID_WINDOW_SZ() to\ncompute a kzalloc size and stored in rxtid->hold_q_sz, leading to\nzero-size or overflowed allocations and subsequent out-of-bounds access.\n\nClean up any previously active aggregation session for the TID first,\nthen return early when win_sz is out of the valid range, instead of\nproceeding with a broken allocation size."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"bdcd81707973cf8aa9305337166f8ee842a050d4","status":"affected","lessThan":"c8e3ca7954d8233fbc54bd370c1827670f43c538","versionType":"git"},{"version":"bdcd81707973cf8aa9305337166f8ee842a050d4","status":"affected","lessThan":"f480d9910fcfe326db3a6281df80e83af347193e","versionType":"git"},{"version":"bdcd81707973cf8aa9305337166f8ee842a050d4","status":"affected","lessThan":"67bc9af4f41f2bdba20404fbd753b2a1bd6dd352","versionType":"git"},{"version":"bdcd81707973cf8aa9305337166f8ee842a050d4","status":"affected","lessThan":"d4558c140782180e2c80a7588a4af9f8675adfc4","versionType":"git"},{"version":"bdcd81707973cf8aa9305337166f8ee842a050d4","status":"affected","lessThan":"5a65fd4722416061698b0a3277222381efbc4882","versionType":"git"},{"version":"bdcd81707973cf8aa9305337166f8ee842a050d4","status":"affected","lessThan":"58c6c8dc2e022e1b4f3dc58725a1ca49ff470f9c","versionType":"git"},{"version":"bdcd81707973cf8aa9305337166f8ee842a050d4","status":"affected","lessThan":"cec0a487cf38ac1f9bca240ffe8a94c5014b72f2","versionType":"git"},{"version":"bdcd81707973cf8aa9305337166f8ee842a050d4","status":"affected","lessThan":"44126b6994eeb28f2103b638e698f40a1244f327","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/ath/ath6kl/txrx.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.2","versionType":"semver"},{"version":"5.10.265","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.216","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.183","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.148","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.101","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.42","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.6","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/ath6kl/txrx.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/c8e3ca7954d8233fbc54bd370c1827670f43c538"},{"url":"https://git.kernel.org/stable/c/f480d9910fcfe326db3a6281df80e83af347193e"},{"url":"https://git.kernel.org/stable/c/67bc9af4f41f2bdba20404fbd753b2a1bd6dd352"},{"url":"https://git.kernel.org/stable/c/d4558c140782180e2c80a7588a4af9f8675adfc4"},{"url":"https://git.kernel.org/stable/c/5a65fd4722416061698b0a3277222381efbc4882"},{"url":"https://git.kernel.org/stable/c/58c6c8dc2e022e1b4f3dc58725a1ca49ff470f9c"},{"url":"https://git.kernel.org/stable/c/cec0a487cf38ac1f9bca240ffe8a94c5014b72f2"},{"url":"https://git.kernel.org/stable/c/44126b6994eeb28f2103b638e698f40a1244f327"}],"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 a malicious WiFi peer (rogue AP or associated client) to trigger ADDBA handling; firmware passes WMI_ADDBA_REQ_EVENTID over the radio link to the ath6kl driver, placing the attacker on the same wireless segment rather than a remote IP network path.\nAC:L - An adjacent attacker can reliably send crafted 802.11 ADDBA requests with out-of-range buffer/window sizes to firmware, which forwards the invalid win_sz to the host; no special memory layout, race, or rare timing is required beyond normal WiFi association.\nPR:N - No local Linux privileges are needed; any associated WiFi peer can induce the malformed ADDBA event. The bug is not reachable via user namespaces or unprivileged local syscalls without controlling the WiFi link/firmware messages.\nUI:N - Once the victim device is associated to WiFi (common on phones, embedded, and IoT), the attacker can send ADDBA and follow-up data frames without any additional victim action beyond routine wireless connectivity.\nS:U - Heap corruption and kernel privilege escalation occur within the same kernel security domain; this is not a VM escape, IOMMU bypass, or cross-authority sandbox breakout.\nC:H - Out-of-bounds access to hold_q allows reading/writing adjacent kernel heap memory (e.g., skb pointers and metadata); OOB kernel heap access is treated as arbitrary memory disclosure potential per kernel CVSS guidance.\nI:H - OOB writes to hold_q entries (struct sk_buff pointers, is_amsdu, seq_no) corrupt kernel heap state and can be leveraged for control-flow hijacking and local privilege escalation, not merely a bounded modification.\nA:H - Invalid win_sz can yield zero-size allocations and hold_q_sz=0 (divide-by-zero in AGGR_WIN_IDX) or inconsistent buffers, causing kernel oops/panic or persistent disruption when aggregation receives subsequent frames."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-19T16:31:18.842Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"5.10.265"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"5.15.216"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"6.1.183"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"6.6.148"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"6.12.101"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"6.18.42"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"7.1.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-68199","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-10-16T15:45:42.892507Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-20","lang":"en","type":"CWE","description":"CWE-20 Improper Input Validation"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-19T20:58:56.656Z"}}]}}}