{"id":"CVE-2026-63903","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-63903","generatedAt":"2026-10-28T00:28:31.723Z","title":"In the Linux kernel, the following vulnerability has been resolved: USB: serial: belkin_sa: validate interrupt status length The Belkin interrupt callback treats interrupt data as a four-byte status report and reads LSR/MSR fields at offsets 2 and 3.","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: serial: belkin_sa: validate interrupt status length\n\nThe Belkin interrupt callback treats interrupt data as a four-byte\nstatus report and reads LSR/MSR fields at offsets 2 and 3. The\ninterrupt-in buffer length is derived from endpoint wMaxPacketSize, and\nshort interrupt transfers may complete successfully with a smaller\nactual_length.\n\nCheck the completed interrupt packet length before parsing status\nfields so short interrupt endpoints and short successful packets are\nignored instead of causing out-of-bounds or stale status-byte reads.\n\nKASAN report as below:\n\nBUG: KASAN: slab-out-of-bounds in belkin_sa_read_int_callback()\nRead of size 1\nCall trace:\n  belkin_sa_read_int_callback() (drivers/usb/serial/belkin_sa.c:202)\n  __usb_hcd_giveback_urb() (drivers/usb/core/hcd.c:1630)\n  dummy_timer() (?:?)","published":"2026-07-19T16:17:08.000Z","lastModified":"2026-07-27T17:44:24.000Z","status":"Awaiting Analysis","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":null,"cwe":[],"affected":[],"epss":{"score":0.00226,"percentile":0.13137,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"unknown","text":"Not yet scored. NVD analysis is pending; check back once CVSS and EPSS values are published."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/22823a319fb2afdf02cacafbed8b613b757efbc8","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/37e54d1b986df35c936d81e5b59a7aa3ec6938f0","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4ce058df2ee02cc2a0f0fd5cd64ce6f1482a0b65","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6a4602221cba7a738442328d66a2f0b1c9bf6e17","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/db1e7eb6203d534dad64cac2c793b69e561e657b","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f1617539ab90e67da788959bfd314076f093a11a","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f361359a952da15e70e693c2d7dca5c5843eae3e","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ffb739a49186ea784bbd9cb91b647f062395b419","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-63903","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}