{"id":"CVE-2026-68353","state":"PUBLISHED","title":"wifi: ath6kl: fix OOB read from firmware num_msg in TX complete handler","description":"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.","publishedAt":"2026-08-10T12:03:30.330Z","updatedAt":"2026-10-19T21:09:06.001Z","severity":{"score":8.1,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"bdcd81707973cf8aa9305337166f8ee842a050d4","status":"affected","lessThan":"5297299c3fa6133275db0be99d69cd759b6cbfe9","versionType":"git"},{"version":"bdcd81707973cf8aa9305337166f8ee842a050d4","status":"affected","lessThan":"35196a07603f8c94a4943093bc26d5b5826285f8","versionType":"git"},{"version":"bdcd81707973cf8aa9305337166f8ee842a050d4","status":"affected","lessThan":"0e0fc04af9b443c6b425f00fb604ff599bc80d1d","versionType":"git"},{"version":"bdcd81707973cf8aa9305337166f8ee842a050d4","status":"affected","lessThan":"69ac7ba3a3df6654e7daa82674575a8c4a1a63ea","versionType":"git"},{"version":"bdcd81707973cf8aa9305337166f8ee842a050d4","status":"affected","lessThan":"289edc3c71344b89e6522891147cfb8f61b088bb","versionType":"git"},{"version":"bdcd81707973cf8aa9305337166f8ee842a050d4","status":"affected","lessThan":"eb636fbc443149b3501c3f97e26225ddcb314a0f","versionType":"git"},{"version":"bdcd81707973cf8aa9305337166f8ee842a050d4","status":"affected","lessThan":"c38b0d5c661951b5dd082bdf31f8a57a0ce6e540","versionType":"git"},{"version":"bdcd81707973cf8aa9305337166f8ee842a050d4","status":"affected","lessThan":"3a21c89215cc18f1a97c5e5bfd1da6d4f3d44495","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/ath/ath6kl/wmi.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/wmi.c"]}],"references":["https://git.kernel.org/stable/c/5297299c3fa6133275db0be99d69cd759b6cbfe9","https://git.kernel.org/stable/c/35196a07603f8c94a4943093bc26d5b5826285f8","https://git.kernel.org/stable/c/0e0fc04af9b443c6b425f00fb604ff599bc80d1d","https://git.kernel.org/stable/c/69ac7ba3a3df6654e7daa82674575a8c4a1a63ea","https://git.kernel.org/stable/c/289edc3c71344b89e6522891147cfb8f61b088bb","https://git.kernel.org/stable/c/eb636fbc443149b3501c3f97e26225ddcb314a0f","https://git.kernel.org/stable/c/c38b0d5c661951b5dd082bdf31f8a57a0ce6e540","https://git.kernel.org/stable/c/3a21c89215cc18f1a97c5e5bfd1da6d4f3d44495"],"weaknesses":["CWE-125"],"ingestedAt":"2026-10-29T20:12:49.727Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/68xxx/CVE-2026-68353.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-68353","state":"PUBLISHED","datePublished":"2026-08-10T12:03:30.330Z","dateUpdated":"2026-10-19T21:09:06.001Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-30T09:28:09.385Z"},"containers":{"cna":{"title":"wifi: ath6kl: fix OOB read from firmware num_msg in TX complete handler","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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"bdcd81707973cf8aa9305337166f8ee842a050d4","status":"affected","lessThan":"5297299c3fa6133275db0be99d69cd759b6cbfe9","versionType":"git"},{"version":"bdcd81707973cf8aa9305337166f8ee842a050d4","status":"affected","lessThan":"35196a07603f8c94a4943093bc26d5b5826285f8","versionType":"git"},{"version":"bdcd81707973cf8aa9305337166f8ee842a050d4","status":"affected","lessThan":"0e0fc04af9b443c6b425f00fb604ff599bc80d1d","versionType":"git"},{"version":"bdcd81707973cf8aa9305337166f8ee842a050d4","status":"affected","lessThan":"69ac7ba3a3df6654e7daa82674575a8c4a1a63ea","versionType":"git"},{"version":"bdcd81707973cf8aa9305337166f8ee842a050d4","status":"affected","lessThan":"289edc3c71344b89e6522891147cfb8f61b088bb","versionType":"git"},{"version":"bdcd81707973cf8aa9305337166f8ee842a050d4","status":"affected","lessThan":"eb636fbc443149b3501c3f97e26225ddcb314a0f","versionType":"git"},{"version":"bdcd81707973cf8aa9305337166f8ee842a050d4","status":"affected","lessThan":"c38b0d5c661951b5dd082bdf31f8a57a0ce6e540","versionType":"git"},{"version":"bdcd81707973cf8aa9305337166f8ee842a050d4","status":"affected","lessThan":"3a21c89215cc18f1a97c5e5bfd1da6d4f3d44495","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/ath/ath6kl/wmi.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/wmi.c"]}],"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"}],"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."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-19T16:33:58.283Z"},"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-2026-68353","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-10-16T15:47:25.988106Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-125","lang":"en","type":"CWE","description":"CWE-125 Out-of-bounds Read"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-19T21:09:06.001Z"}}]}}}