CVE-2023-53840

usb: early: xhci-dbc: Fix a potential out-of-bound memory access

N/A
Published: December 9, 2025 at 01:29 AM UTC
Updated: June 17, 2026 at 06:46 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
N/A
Exploit prediction
EPSS 0.2%

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

4.12 ≤ v < 5.15.994.12 ≤ v < 6.1.164.12 ≤ v < 6.2.34.12 ≤ v < 6.34.12aeb9dd1de98c1a5f2007ea5d2a154c1244caf8a0
Vendor states this is fixed in 351c8d8650d1ccc006255fa01f98b6c6496a02e5 (fixed)
Vendor states this is fixed in a4a97ab3db5c081eb6e7dba91306adefb461e0bd (fixed)
Vendor states this is fixed in df7c8aba7309f4dc55df94e06b67f576c0f52406 (fixed)
Vendor states this is fixed in e8fb0f13e45cf361fd06593d3cb2d89915cd3bd0 (fixed)
Vendor states this is fixed in 4.12 (unaffected)
Vendor states this is fixed in 5.15.99 (unaffected)
Vendor states this is fixed in 6.1.16 (unaffected)
Vendor states this is fixed in 6.2.3 (unaffected)
Vendor states this is fixed in 6.3 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

Quick Info

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