CVE-2026-63904

Summary

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

usb: usbtmc: check URB actual_length for interrupt-IN notifications

USBTMC devices can use an optional interrupt endpoint for notification messages. These typically contain two-byte headers indicating the payload format, but the driver does not check if these headers are present before accessing the data buffers. In cases where the URB actual_length is not enough to fit these headers, the driver will either cause an out-of-bounds read, or consume stale leftover data from a previous notification.

Fix by checking if actual_data contains enough bytes for the headers, otherwise resubmit URB to the interrupt endpoint.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxdbf3e7f654c0f06a932b8fcafac78de9d0b81d68 < e794bd67b3faf98af46f958897f6b91412c7d2a9affected
LinuxLinuxdbf3e7f654c0f06a932b8fcafac78de9d0b81d68 < e3eec3005de44e7f37d8d7724be636446516ab42affected
LinuxLinuxdbf3e7f654c0f06a932b8fcafac78de9d0b81d68 < ae87f505917e703ae3b487d9663d78826ff43608affected
LinuxLinuxdbf3e7f654c0f06a932b8fcafac78de9d0b81d68 < 5de7df75ef3a2756b25fe3d582a4a2970444fe5aaffected
LinuxLinuxdbf3e7f654c0f06a932b8fcafac78de9d0b81d68 < 69020fa089f1bf0e1a10a15265f31b143a846409affected
LinuxLinuxdbf3e7f654c0f06a932b8fcafac78de9d0b81d68 < 75f6d3da2cc646983f41807ef98851569c12bca9affected
LinuxLinuxdbf3e7f654c0f06a932b8fcafac78de9d0b81d68 < f141b01eaa58ac7e323931d670318aa247bff087affected
LinuxLinuxdbf3e7f654c0f06a932b8fcafac78de9d0b81d68 < 52f2ad3f7e5eb3b5908e1d685d4342519dc9cfcdaffected
LinuxLinux4.6affected
LinuxLinux0 < 4.6unaffected
LinuxLinux5.10.259 <= 5.10.*unaffected
LinuxLinux5.15.210 <= 5.15.*unaffected
LinuxLinux6.1.176 <= 6.1.*unaffected
LinuxLinux6.6.143 <= 6.6.*unaffected
LinuxLinux6.12.93 <= 6.12.*unaffected
LinuxLinux6.18.35 <= 6.18.*unaffected
LinuxLinux7.0.12 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References