USB: serial: mct_u232: fix memory corruption with small endpoint
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.
02 / AFFECTED SOFTWARE
Affected packages
1833 explicit affected versions
04 / EVIDENCE
Source records
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.
05 / REFERENCES
Further evidence
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/39e295a91e80f3b91f61c7ada2bde434dcaba20d
- https://git.kernel.org/stable/c/57f332af1745014cd7e40414814ffaa6bc7d3b5b
- https://git.kernel.org/stable/c/6cb48f8890f9b2051d7c34823057296a536a31c5
- https://git.kernel.org/stable/c/90dbad14b109e5fdfb4934ff61e561d11ba3742d
- https://git.kernel.org/stable/c/915b36d701950503c4ea0f6e314b10868e59fce3
- https://git.kernel.org/stable/c/94edbbc5fe00d03cfe1d4e690d7d2cd36317a935
- https://git.kernel.org/stable/c/bd2ddb3fe9052ad8703593bbec26ecc7ca92869e
- https://git.kernel.org/stable/c/d8fdf33d6fcfb90cbec26299baf2352c84b2d768
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63898.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-63898