{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-68353", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.385Z", "datePublished": "2026-08-10T12:03:30.330Z", "dateUpdated": "2026-08-19T16:33:58.283Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-19T16:33:58.283Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath6kl: fix OOB read from firmware num_msg in TX complete handler\n\nThe firmware-controlled num_msg field (u8, 0-255) drives the loop in\nath6kl_wmi_tx_complete_event_rx() without validation against the buffer\nlength. This allows out-of-bounds reads of up to 1020 bytes past the\nWMI event buffer when the firmware sends an inflated num_msg.\n\nAdd a check that the buffer is large enough to hold the fixed struct\nand the num_msg variable-length entries." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "baseScore": 8.1, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:A - The vulnerable handler parses WMI control events delivered by the ath6kl AR600x wireless firmware over SDIO/USB; an attacker on the same wireless segment who subverts or influences the wireless device's firmware supplies the malformed event, matching the adjacent-network vector used for other ath driver event-parsing flaws.\nAC:L - Triggering requires only a WMI_TX_COMPLETE_EVENTID event whose payload is shorter than num_msg * 4 bytes; the loop bound is taken directly from the event with no validation, so the read happens deterministically every time.\nPR:N - The event is processed in the driver's asynchronous control-message receive path with no capability check, no syscall entry, and no authentication or association gate; the attacker needs no credentials on the target system.\nUI:N - The WMI event is handled automatically by the driver as soon as the interface is running; no victim action such as opening a file or issuing a command is needed.\nS:U - The out-of-bounds read stays within the kernel's own memory and security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Up to 1020 bytes past the event buffer are read and the contents are emitted through ath6kl_dbg() into the kernel log on debug builds, disclosing adjacent kernel heap data well beyond a small bounded read.\nI:N - The loop only reads and prints the out-of-bounds entries; there is no write to kernel memory and no attacker-controlled pointer is dereferenced for modification.\nA:H - The read can walk past the end of the slab allocation into unmapped or redzoned memory, producing an oops or a KASAN panic on hardened/debug kernels and thus a full loss of availability." } ] } ], "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/wmi.c" ], "versions": [ { "version": "bdcd81707973cf8aa9305337166f8ee842a050d4", "lessThan": "5297299c3fa6133275db0be99d69cd759b6cbfe9", "status": "affected", "versionType": "git" }, { "version": "bdcd81707973cf8aa9305337166f8ee842a050d4", "lessThan": "35196a07603f8c94a4943093bc26d5b5826285f8", "status": "affected", "versionType": "git" }, { "version": "bdcd81707973cf8aa9305337166f8ee842a050d4", "lessThan": "0e0fc04af9b443c6b425f00fb604ff599bc80d1d", "status": "affected", "versionType": "git" }, { "version": "bdcd81707973cf8aa9305337166f8ee842a050d4", "lessThan": "69ac7ba3a3df6654e7daa82674575a8c4a1a63ea", "status": "affected", "versionType": "git" }, { "version": "bdcd81707973cf8aa9305337166f8ee842a050d4", "lessThan": "289edc3c71344b89e6522891147cfb8f61b088bb", "status": "affected", "versionType": "git" }, { "version": "bdcd81707973cf8aa9305337166f8ee842a050d4", "lessThan": "eb636fbc443149b3501c3f97e26225ddcb314a0f", "status": "affected", "versionType": "git" }, { "version": "bdcd81707973cf8aa9305337166f8ee842a050d4", "lessThan": "c38b0d5c661951b5dd082bdf31f8a57a0ce6e540", "status": "affected", "versionType": "git" }, { "version": "bdcd81707973cf8aa9305337166f8ee842a050d4", "lessThan": "3a21c89215cc18f1a97c5e5bfd1da6d4f3d44495", "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/wmi.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/5297299c3fa6133275db0be99d69cd759b6cbfe9" }, { "url": "https://git.kernel.org/stable/c/35196a07603f8c94a4943093bc26d5b5826285f8" }, { "url": "https://git.kernel.org/stable/c/0e0fc04af9b443c6b425f00fb604ff599bc80d1d" }, { "url": "https://git.kernel.org/stable/c/69ac7ba3a3df6654e7daa82674575a8c4a1a63ea" }, { "url": "https://git.kernel.org/stable/c/289edc3c71344b89e6522891147cfb8f61b088bb" }, { "url": "https://git.kernel.org/stable/c/eb636fbc443149b3501c3f97e26225ddcb314a0f" }, { "url": "https://git.kernel.org/stable/c/c38b0d5c661951b5dd082bdf31f8a57a0ce6e540" }, { "url": "https://git.kernel.org/stable/c/3a21c89215cc18f1a97c5e5bfd1da6d4f3d44495" } ], "title": "wifi: ath6kl: fix OOB read from firmware num_msg in TX complete handler", 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