CVE-2023-40216

Name: CVE-2023-40216
Creator: NVD / NIST
Published: 2023-08-10T16:15:09.907+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.14%

Last modified Jun 17, 2026

CVE-2023-40216 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. OpenBSD 7.3 before errata 014 is missing an argument-count bounds check in console terminal emulation. This could cause incorrect memory access and a kernel crash after receiving crafted DCS or CSI terminal escape sequences.. EPSS estimates a 0.14% chance of exploitation in the next 30 days.

Description

OpenBSD 7.3 before errata 014 is missing an argument-count bounds check in console terminal emulation. This could cause incorrect memory access and a kernel crash after receiving crafted DCS or CSI terminal escape sequences.

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.14%

3.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-862

Affected Software

Vendor	Product	Versions
Openbsd	Openbsd	7.3

References

https://ftp.openbsd.org/pub/OpenBSD/patches/7.3/common/014_wscons.patch.sigPatch, Vendor Advisory
https://github.com/openbsd/src/commit/9d3f688f46eba347e96ff0ae9506ef2061622e0cPatch
https://ftp.openbsd.org/pub/OpenBSD/patches/7.3/common/014_wscons.patch.sigPatch, Vendor Advisory
https://github.com/openbsd/src/commit/9d3f688f46eba347e96ff0ae9506ef2061622e0cPatch

Timeline

Published: Aug 10, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-40216?

How severe is CVE-2023-40216?

CVE-2023-40216 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.14% probability of exploitation in the next 30 days.

How do I fix CVE-2023-40216?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-40216?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST