{"id":"CVE-2026-68373","revision":null,"records":[{"revision":"9671ef45622d4b1090da6ce13534fb6a","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-68373","aliases":[],"title":"wifi: at76c50x-usb: avoid length underflow in at76_guess_freq()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: at76c50x-usb: avoid length underflow in at76_guess_freq()\n\nat76_guess_freq() checks only that the received frame is at least a bare\n802.11 header (24 bytes) before subtracting the fixed management-body\noffset:\n\n\tlen -= el_off;\n\nFor both beacon and probe response frames, el_off is 36. If the frame is\nshorter than el_off, subtracting it causes the calculated IE length to\nwrap. The length is eventually passed to cfg80211_find_elem_match() as a\nvery large unsigned value, so the element walk runs beyond the RX skb.\n\nThis path is reached from at76_rx_tasklet() while scanning. If the device\ndelivers a truncated beacon or probe response, the oversized IE length\ncauses an out-of-bounds read during scanning.\n\nSkip the IE lookup if the frame does not reach the variable elements,\nbefore subtracting el_off.","state":0,"publishedAt":"2026-08-10T12:03:51.663+00:00","modifiedAt":"2026-10-19T21:09:06.316+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/net/wireless/atmel/at76c50x-usb.c\"\n ],\n \"versions\": [\n {\n \"version\": \"1264b951463a00efebe1bb596499aaad620ec8af\",\n \"lessThan\": \"cb831aff2f850f72bc5ff5ad77d0a70bb5a84061\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1264b951463a00efebe1bb596499aaad620ec8af\",\n \"lessThan\": \"4875680d1703f56afa6257ba30244f2fb44ed205\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1264b951463a00efebe1bb596499aaad620ec8af\",\n \"lessThan\": \"b406f33d234f98c8b310fdab5cbb492d85e98e49\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1264b951463a00efebe1bb596499aaad620ec8af\",\n \"lessThan\": \"e165a1d295e7e814e13b0f92c86e5d48309509ce\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1264b951463a00efebe1bb596499aaad620ec8af\",\n \"lessThan\": \"bcde7249d45f52f994a9872bedf45994472ade77\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1264b951463a00efebe1bb596499aaad620ec8af\",\n \"lessThan\": \"fb1b50ab699211e777dca5ccfb648788b6a6e519\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1264b951463a00efebe1bb596499aaad620ec8af\",\n \"lessThan\": \"f742d9c98b5c504fc9e6744eef13a721c2aea486\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1264b951463a00efebe1bb596499aaad620ec8af\",\n \"lessThan\": \"61a799ffd1e5a4fd3702d547828b7ff3d161468e\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/net/wireless/atmel/at76c50x-usb.c\"\n ],\n \"versions\": [\n {\n \"version\": \"2.6.30\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"2.6.30\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.265\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.216\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.183\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.148\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.101\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.42\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.1.6\",\n \"lessThanOrEqual\": \"7.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.2\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","score":8.1,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/cb831aff2f850f72bc5ff5ad77d0a70bb5a84061","https://git.kernel.org/stable/c/4875680d1703f56afa6257ba30244f2fb44ed205","https://git.kernel.org/stable/c/b406f33d234f98c8b310fdab5cbb492d85e98e49","https://git.kernel.org/stable/c/e165a1d295e7e814e13b0f92c86e5d48309509ce","https://git.kernel.org/stable/c/bcde7249d45f52f994a9872bedf45994472ade77","https://git.kernel.org/stable/c/fb1b50ab699211e777dca5ccfb648788b6a6e519","https://git.kernel.org/stable/c/f742d9c98b5c504fc9e6744eef13a721c2aea486","https://git.kernel.org/stable/c/61a799ffd1e5a4fd3702d547828b7ff3d161468e"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-68373","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-68373","identifiers":["CVE-2026-68373"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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