PT-2026-61215 · Linux · Linux

CVE-2026-63898 · Published 2026-07-19 · Updated 2026-07-19

NVD

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.

Related Identifiers

CVE-2026-63898

Affected Products

Linux

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2026-63898 · Security Note
• https://git.kernel.org/stable/c/94edbbc5fe00d03cfe1d4e690d7d2cd36317a935 · Note
• https://git.kernel.org/stable/c/d8fdf33d6fcfb90cbec26299baf2352c84b2d768 · Note
• https://git.kernel.org/stable/c/915b36d701950503c4ea0f6e314b10868e59fce3 · Note
• https://git.kernel.org/stable/c/90dbad14b109e5fdfb4934ff61e561d11ba3742d · Note
• https://git.kernel.org/stable/c/57f332af1745014cd7e40414814ffaa6bc7d3b5b · Note
• https://git.kernel.org/stable/c/6cb48f8890f9b2051d7c34823057296a536a31c5 · Note
• https://git.kernel.org/stable/c/bd2ddb3fe9052ad8703593bbec26ecc7ca92869e · Note
• https://git.kernel.org/stable/c/39e295a91e80f3b91f61c7ada2bde434dcaba20d · Note