CVE-2026-63898

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 94edbbc5fe00d03cfe1d4e690d7d2cd36317a935affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < bd2ddb3fe9052ad8703593bbec26ecc7ca92869eaffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 39e295a91e80f3b91f61c7ada2bde434dcaba20daffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 90dbad14b109e5fdfb4934ff61e561d11ba3742daffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 6cb48f8890f9b2051d7c34823057296a536a31c5affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < d8fdf33d6fcfb90cbec26299baf2352c84b2d768affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 57f332af1745014cd7e40414814ffaa6bc7d3b5baffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 915b36d701950503c4ea0f6e314b10868e59fce3affected
LinuxLinux2.6.12affected
LinuxLinux0 < 2.6.12unaffected
LinuxLinux5.10.259 <= 5.10.*unaffected
LinuxLinux5.15.210 <= 5.15.*unaffected
LinuxLinux6.1.176 <= 6.1.*unaffected
LinuxLinux6.6.143 <= 6.6.*unaffected
LinuxLinux6.12.94 <= 6.12.*unaffected
LinuxLinux6.18.35 <= 6.18.*unaffected
LinuxLinux7.0.12 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References