Is CVE-2023-53840 in the CISA KEV catalog?

No. CVE-2023-53840 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the EPSS score for CVE-2023-53840?

CVE-2023-53840 has an EPSS score of 0.21% (11th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-53840?

Upgrade linux on debian 12 to 6.1.20-1 or later.

CVE & CISA-KEV Catalog

CVE-2023-53840

UNSCORED

NVD

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.

How to fix

Remediation Available

linuxDebian

Fixed in:6.1.20-1CVE-2023-53840

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3.1 Vector

No CVSS vector data available.

Exploit Intelligence

0.21%probability of exploitation in 30 days

11thpercentile

Low risk: more likely to be exploited than 11% of all known CVEs.

References

Other references4

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-12-09.