{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-68199", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.374Z", "datePublished": "2026-08-10T12:00:18.278Z", "dateUpdated": "2026-08-19T16:31:18.842Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-19T16:31:18.842Z" }, "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." } ], "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." } ] } ], "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/ath6kl/txrx.c" ], "versions": [ { "version": "bdcd81707973cf8aa9305337166f8ee842a050d4", "lessThan": "c8e3ca7954d8233fbc54bd370c1827670f43c538", "status": "affected", "versionType": "git" }, { "version": "bdcd81707973cf8aa9305337166f8ee842a050d4", "lessThan": "f480d9910fcfe326db3a6281df80e83af347193e", "status": "affected", "versionType": "git" }, { "version": "bdcd81707973cf8aa9305337166f8ee842a050d4", "lessThan": "67bc9af4f41f2bdba20404fbd753b2a1bd6dd352", "status": "affected", "versionType": "git" }, { "version": "bdcd81707973cf8aa9305337166f8ee842a050d4", "lessThan": "d4558c140782180e2c80a7588a4af9f8675adfc4", "status": "affected", "versionType": "git" }, { "version": "bdcd81707973cf8aa9305337166f8ee842a050d4", "lessThan": "5a65fd4722416061698b0a3277222381efbc4882", "status": "affected", "versionType": "git" }, { "version": "bdcd81707973cf8aa9305337166f8ee842a050d4", "lessThan": "58c6c8dc2e022e1b4f3dc58725a1ca49ff470f9c", "status": "affected", "versionType": "git" }, { "version": "bdcd81707973cf8aa9305337166f8ee842a050d4", "lessThan": "cec0a487cf38ac1f9bca240ffe8a94c5014b72f2", "status": "affected", "versionType": "git" }, { "version": "bdcd81707973cf8aa9305337166f8ee842a050d4", "lessThan": "44126b6994eeb28f2103b638e698f40a1244f327", "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/ath6kl/txrx.c" ], "versions": [ { "version": "3.2", "status": "affected" }, { "version": "0", "lessThan": "3.2", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.265", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.216", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.183", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.148", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.101", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.42", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.6", "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": "3.2", "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" } ] } ] } ], "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" } ], "title": "wifi: ath6kl: fix OOB access from firmware ADDBA window size", "x_generator": { "engine": "bippy-1.2.0" } } } }