CVE-2026-63898

USB: serial: mct_u232: fix memory corruption with small endpoint

published July 19, 2026

CVSS
—
EPSS
0%
Percentile
12.6
In the wild
Unconfirmed
What it is

In the Linux kernel, the following vulnerability has been resolved:

USB: serial: mct_u232: fix memory corruption with small endpoint

The driver overrides the maximum transfer size for a specific device

which only accepts 16 byte packets for its 32 byte bulk-out endpoint.

Make sure to never increase the maximum transfer size to prevent slab

corruption should a malicious device report a smaller endpoint max

packet size than expected.

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.00226 · 12.6th percentile
Published
2026-07-19T14:55Z
EPSS history
Timeline
  • 19 JUL 14:55Z
    USB: serial: mct_u232: fix memory corruption with small endpoint
    cvelistv5