{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89524", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.719Z", "datePublished": "2026-09-11T19:44:05.548Z", "dateUpdated": "2026-09-11T19:44:05.548Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-11T19:44:05.548Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath6kl: clamp assoc request/response lengths before subtracting IE offsets\n\nath6kl_cfg80211_connect_event() subtracts fixed IE offsets from\nassoc_req_len (-= 4) and assoc_resp_len (-= 6), both u8, with no lower\nbound. The aggregate check recently added to ath6kl_wmi_connect_event_rx()\nbounds the declared lengths from above (their sum must fit the received\nevent), but an assoc request/response shorter than its fixed offset still\nunderflows here: the u8 wraps to ~250, and cfg80211_connect_result() /\ncfg80211_roamed() then treat that wrapped value as the IE length and copy\nthat many bytes out of the small assoc_info buffer to user space via\nnl80211, disclosing adjacent slab memory.\n\nClamp both lengths to their offsets before subtracting.\n\nFound by 0sec (https://0sec.ai) using automated source analysis; the\nmissing lower bound is evident from source. Compile-tested."}], "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/cfg80211.c"], "versions": [{"version": "bdcd81707973cf8aa9305337166f8ee842a050d4", "lessThan": "e3619bed5da125713b29ac881dc66f5e06606f88", "status": "affected", "versionType": "git"}, {"version": "bdcd81707973cf8aa9305337166f8ee842a050d4", "lessThan": "e1330d719c047c4d8190a16be034b29fc601a815", "status": "affected", "versionType": "git"}, {"version": "bdcd81707973cf8aa9305337166f8ee842a050d4", "lessThan": "8eb73016fb3968cf2db3987a92764563a3af773a", "status": "affected", "versionType": "git"}, {"version": "bdcd81707973cf8aa9305337166f8ee842a050d4", "lessThan": "3bbd05723d15dd06f0560bcd94fbf9a91b5f5613", "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/cfg80211.c"], "versions": [{"version": "3.2", "status": "affected"}, {"version": "0", "lessThan": "3.2", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3-rc1", "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": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.2", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.2", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.2", "versionEndExcluding": "7.3-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/e3619bed5da125713b29ac881dc66f5e06606f88"}, {"url": "https://git.kernel.org/stable/c/e1330d719c047c4d8190a16be034b29fc601a815"}, {"url": "https://git.kernel.org/stable/c/8eb73016fb3968cf2db3987a92764563a3af773a"}, {"url": "https://git.kernel.org/stable/c/3bbd05723d15dd06f0560bcd94fbf9a91b5f5613"}], "title": "wifi: ath6kl: clamp assoc request/response lengths before subtracting IE offsets", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/net/wireless/ath/ath6kl/cfg80211.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "e3619bed5da125713b29ac881dc66f5e06606f88", "status": "affected", "version": "bdcd81707973cf8aa9305337166f8ee842a050d4", "versionType": "git"}, {"lessThan": "e1330d719c047c4d8190a16be034b29fc601a815", "status": "affected", "version": "bdcd81707973cf8aa9305337166f8ee842a050d4", "versionType": "git"}, {"lessThan": "8eb73016fb3968cf2db3987a92764563a3af773a", "status": "affected", "version": "bdcd81707973cf8aa9305337166f8ee842a050d4", "versionType": "git"}, {"lessThan": "3bbd05723d15dd06f0560bcd94fbf9a91b5f5613", "status": "affected", "version": "bdcd81707973cf8aa9305337166f8ee842a050d4", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/net/wireless/ath/ath6kl/cfg80211.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "3.2"}, {"lessThan": "3.2", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.109", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3-rc1", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath6kl: clamp assoc request/response lengths before subtracting IE offsets\n\nath6kl_cfg80211_connect_event() subtracts fixed IE offsets from\nassoc_req_len (-= 4) and assoc_resp_len (-= 6), both u8, with no lower\nbound. The aggregate check recently added to ath6kl_wmi_connect_event_rx()\nbounds the declared lengths from above (their sum must fit the received\nevent), but an assoc request/response shorter than its fixed offset still\nunderflows here: the u8 wraps to ~250, and cfg80211_connect_result() /\ncfg80211_roamed() then treat that wrapped value as the IE length and copy\nthat many bytes out of the small assoc_info buffer to user space via\nnl80211, disclosing adjacent slab memory.\n\nClamp both lengths to their offsets before subtracting.\n\nFound by 0sec (https://0sec.ai) using automated source analysis; the\nmissing lower bound is evident from source. Compile-tested."}], "id": "CVE-2026-89524", "lastModified": "2026-09-11T20:19:35.137", "metrics": {}, "published": "2026-09-11T20:19:35.137", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3bbd05723d15dd06f0560bcd94fbf9a91b5f5613"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8eb73016fb3968cf2db3987a92764563a3af773a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e1330d719c047c4d8190a16be034b29fc601a815"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e3619bed5da125713b29ac881dc66f5e06606f88"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: ath6kl Wi-Fi driver information disclosure via integer underflow", "id": "2532320", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532320"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.4", "cvss3_scoring_vector": "CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["A flaw was found in the ath6kl Wi-Fi driver of the Linux kernel. An integer underflow vulnerability occurs when processing Wi-Fi association requests or responses that are shorter than expected. This can cause the system to read beyond the intended buffer, leading to the disclosure of adjacent memory to a remote attacker. This information disclosure could potentially expose sensitive data."], "name": "CVE-2026-89524", "public_date": "2026-09-11T19:44:05Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89524\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89524\nhttps://git.kernel.org/stable/c/3bbd05723d15dd06f0560bcd94fbf9a91b5f5613\nhttps://git.kernel.org/stable/c/8eb73016fb3968cf2db3987a92764563a3af773a\nhttps://git.kernel.org/stable/c/e1330d719c047c4d8190a16be034b29fc601a815\nhttps://git.kernel.org/stable/c/e3619bed5da125713b29ac881dc66f5e06606f88"], "threat_severity": "Important"}

{}