CVE-2026-63903
Full vulnerability record from the local CVENow database.
Description
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. The interrupt-in buffer length is derived from endpoint wMaxPacketSize, and short interrupt transfers may complete successfully with a smaller actual_length. Check the completed interrupt packet length before parsing status fields so short interrupt endpoints and short successful packets are ignored instead of causing out-of-bounds or stale status-byte reads. KASAN report as below: BUG: KASAN: slab-out-of-bounds in belkin_sa_read_int_callback() Read of size 1 Call trace: belkin_sa_read_int_callback() (drivers/usb/serial/belkin_sa.c:202) __usb_hcd_giveback_urb() (drivers/usb/core/hcd.c:1630) dummy_timer() (?:?)
Severity
HIGH
CVSS score
7.1
(v3.1)
Vulnerability status
Analyzed
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-07-19 16:17:08
Last modified
2026-10-30 14:37:48.093000
View original CVE JSON
{
"id": "CVE-2026-63903",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-07-19T16:17:08.000",
"lastModified": "2026-10-30T14:37:48.093",
"vulnStatus": "Analyzed",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "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() (?:?)"
}
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"source": "[email protected]",
"type": "Primary",
"description": [
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