CVE-2023-53840
published 2025-12-09CVE-2023-53840: 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()…
PriorityP420medium6.1
EPSS
0.24%
15.3th percentile
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
12 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.1.20-1 (bookworm) | linux 6.1.20-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= aeb9dd1de98c1a5f2007ea5d2a154c1244caf8a0 < e8fb0f13e45cf361fd06593d3cb2d89915cd3bd0 | e8fb0f13e45cf361fd06593d3cb2d89915cd3bd0 |
| linux | linux | >= aeb9dd1de98c1a5f2007ea5d2a154c1244caf8a0 < 351c8d8650d1ccc006255fa01f98b6c6496a02e5 | 351c8d8650d1ccc006255fa01f98b6c6496a02e5 |
| linux | linux | >= aeb9dd1de98c1a5f2007ea5d2a154c1244caf8a0 < df7c8aba7309f4dc55df94e06b67f576c0f52406 | df7c8aba7309f4dc55df94e06b67f576c0f52406 |
| linux | linux | >= aeb9dd1de98c1a5f2007ea5d2a154c1244caf8a0 < a4a97ab3db5c081eb6e7dba91306adefb461e0bd | a4a97ab3db5c081eb6e7dba91306adefb461e0bd |
| linux | linux_kernel | >= 0 < 6.1.20-1 | 6.1.20-1 |
| linux | linux_kernel | >= 0 < 6.1.20-1 | 6.1.20-1 |
| linux | linux_kernel | >= 0 < 6.1.20-1 | 6.1.20-1 |
| linux | linux_kernel | >= 4.12.0 < 5.15.99 | 5.15.99 |
| linux | linux_kernel | >= 5.16.0 < 6.1.16 | 6.1.16 |
| linux | linux_kernel | >= 6.2.0 < 6.2.3 | 6.2.3 |
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OSV
usb: early: xhci-dbc: Fix a potential out-of-bound memory access
osv·2025-12-09
CVE-2023-53840 usb: early: xhci-dbc: Fix a potential out-of-bound memory access
usb: early: xhci-dbc: Fix a potential out-of-bound memory access
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.
GHSA
GHSA-x48h-3p3j-rpqg: 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_wr
ghsa_unreviewed·2025-12-09
CVE-2023-53840 GHSA-x48h-3p3j-rpqg: 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_wr
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.
OSV
CVE-2023-53840: 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_writ
osv·2025-12-09
CVE-2023-53840 CVE-2023-53840: 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_writ
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.
Red Hat
kernel: usb: early: xhci-dbc: Fix a potential out-of-bound memory access
vendor_redhat·2025-12-09·CVSS 6.1
CVE-2023-53840 [MEDIUM] CWE-125 kernel: usb: early: xhci-dbc: Fix a potential out-of-bound memory access
kernel: usb: early: xhci-dbc: Fix a potential out-of-bound memory access
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.
Package: kernel (Red Hat Enterprise Linux 10) - Not affected
Package: kernel (Red Hat Enterprise Linux 6) - Not affected
Package: kernel (Red Hat Enterprise Linux 7) - Not affected
Package: kernel-rt (Red Hat Enterprise Linux 7) - Not affected
Package: kernel (Red Hat Enterprise Linux 8) - Out of su
Debian
CVE-2023-53840: linux - In the Linux kernel, the following vulnerability has been resolved: usb: early:...
vendor_debian·2023
CVE-2023-53840 CVE-2023-53840: linux - In the Linux kernel, the following vulnerability has been resolved: usb: early:...
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.
Scope: local
bookworm: resolved (fixed in 6.1.20-1)
bullseye: open
forky: resolved (fixed in 6.1.20-1)
sid: resolved (fixed in 6.1.20-1)
trixie: resolved (fixed in 6.1.20-1)
No detection rules found.
No public exploits indexed.
Wiz
CVE-2023-53840 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz
CVE-2023-53840 CVE-2023-53840 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2023-53840 :
Linux Kernel vulnerability analysis and mitigation
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.
Source : NVD
Published December 9, 2025
CNA Score N/A
Affected Technologies
Linux Kernel
Linux Debian
Has Public Exploit No
Has CISA KEV Exploit No
CISA KEV Release Date N/A
CISA KEV Due Date N/A
Exploitation Probability Percentile (EPSS) 7.4
Exploitation Probability (EPSS) N/A
Affected pa
Bugzilla
CVE-2023-53840 kernel: usb: early: xhci-dbc: Fix a potential out-of-bound memory access
bugzilla·2025-12-09
CVE-2023-53840 [MEDIUM] CVE-2023-53840 kernel: usb: early: xhci-dbc: Fix a potential out-of-bound memory access
CVE-2023-53840 kernel: usb: early: xhci-dbc: Fix a potential out-of-bound memory access
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.
Discussion:
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025120957-CVE-2023-53840-797d@gregkh/T
2025-12-09
Published