CVE-2026-63898

high

Description

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.

References

https://git.kernel.org/stable/c/d8fdf33d6fcfb90cbec26299baf2352c84b2d768

https://git.kernel.org/stable/c/bd2ddb3fe9052ad8703593bbec26ecc7ca92869e

https://git.kernel.org/stable/c/94edbbc5fe00d03cfe1d4e690d7d2cd36317a935

https://git.kernel.org/stable/c/915b36d701950503c4ea0f6e314b10868e59fce3

https://git.kernel.org/stable/c/90dbad14b109e5fdfb4934ff61e561d11ba3742d

https://git.kernel.org/stable/c/6cb48f8890f9b2051d7c34823057296a536a31c5

https://git.kernel.org/stable/c/57f332af1745014cd7e40414814ffaa6bc7d3b5b

https://git.kernel.org/stable/c/39e295a91e80f3b91f61c7ada2bde434dcaba20d

Details

Source: Mitre, NVD

Published: 2026-07-19

Updated: 2026-07-19

Risk Information

CVSS v2

Base Score: 6.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:N/I:C/A:C

Severity: Medium

CVSS v3

Base Score: 7.1

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Severity: High

EPSS

EPSS: 0.0021