{"id":"CVE-2026-68373","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-68373","summary":"wifi: at76c50x-usb: avoid length underflow in at76_guess_freq()","details":"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.","published":"2026-08-10T12:03:51.663Z","modified":"2026-08-14T04:04:12.296651571Z","cvss":{"score":8.1,"severity":"HIGH","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"6.6.148"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/61a799ffd1e5a4fd3702d547828b7ff3d161468e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bcde7249d45f52f994a9872bedf45994472ade77"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e165a1d295e7e814e13b0f92c86e5d48309509ce"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f742d9c98b5c504fc9e6744eef13a721c2aea486"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fb1b50ab699211e777dca5ccfb648788b6a6e519"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68373.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68373"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-14T04:04:12.296651571Z"}}