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CVE-2026-63903

USB: serial: belkin_sa: validate interrupt status length PUBLISHED

Description (CNA)

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() (?:?)

Affected (CNA)

Vendor / productVersions
Linux / Linuxaffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before f1617539ab90e67da788959bfd314076f093a11a; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before f361359a952da15e70e693c2d7dca5c5843eae3e; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 37e54d1b986df35c936d81e5b59a7aa3ec6938f0; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before ffb739a49186ea784bbd9cb91b647f062395b419; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 6a4602221cba7a738442328d66a2f0b1c9bf6e17; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 22823a319fb2afdf02cacafbed8b613b757efbc8; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before db1e7eb6203d534dad64cac2c793b69e561e657b; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 4ce058df2ee02cc2a0f0fd5cd64ce6f1482a0b65
Linux / Linuxaffected 2.6.12; unaffected 0 before 2.6.12; unaffected 5.10.259 through 5.10.*; unaffected 5.15.210 through 5.15.*; unaffected 6.1.176 through 6.1.*; unaffected 6.6.143 through 6.6.*; unaffected 6.12.93 through 6.12.*; unaffected 6.18.35 through 6.18.*; unaffected 7.0.12 through 7.0.*; unaffected 7.1 through *

CWE

No CWE identifiers supplied.

References