CVE-2023-40216

MEDIUMNVD 5.55.5—

5.5

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.

CVSS v3: 5.5
EG Score: 5.5(medium)
EPSS: 15.0%
KEV: Not listed

Published

August 10, 2023

Last Modified

November 21, 2024

References (4)

cve@mitrehttps://ftp.openbsd.org/pub/OpenBSD/patches/7.3/common/014_wscons.patch.sig
cve@mitrehttps://github.com/openbsd/src/commit/9d3f688f46eba347e96ff0ae9506ef2061622e0c
af854a3a-2127-422b-91ae-364da2661108https://ftp.openbsd.org/pub/OpenBSD/patches/7.3/common/014_wscons.patch.sig
af854a3a-2127-422b-91ae-364da2661108https://github.com/openbsd/src/commit/9d3f688f46eba347e96ff0ae9506ef2061622e0c

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-862Missing Authorization

Data Freshness Timeline

(refreshed 15× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

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Frequently asked(5)

What is CVE-2023-40216?

CVE-2023-40216 is a medium vulnerability published on August 10, 2023. 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.

When was CVE-2023-40216 disclosed?

CVE-2023-40216 was first published in the National Vulnerability Database on August 10, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-40216 actively exploited?

CVE-2023-40216 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 15.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-40216?

CVE-2023-40216 has a CVSS v3 base score of 5.5 (NVD).

How do I remediate CVE-2023-40216?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-40216, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2023-40216

📅 Published

🔄 Last Modified

🔗 References (4)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-40216?

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References (4)

Frequently asked(5)

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