CVE-2023-53840: Linux

EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: usb: early: xhci-dbc: Fix a potential out-of-bound memory access If xdbc_bulk_write() fails, the values in 'buf' can be anything. So the string is not guaranteed to be NULL terminated when xdbc_trace() is called. Reserve an extra byte, which will be zeroed automatically because 'buf' is a static variable, in order to avoid troubles, should it happen.

Affected products

• Linux Linux: from 4.12, before 5.15.99 (fixed in 5.15.99); from 5.16, before 6.1.16 (fixed in 6.1.16); from 6.2, before 6.2.3 (fixed in 6.2.3)

Published 2025-12-09. Last modified 2026-06-17.