CVE-2023-52558

Q: How do I fix CVE-2023-52558?

Upgrade openbsd to 7.3 or later.

Q: Is CVE-2023-52558 being actively exploited?

Not that we know of. CVE-2023-52558 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.70% is the estimated probability that it will be exploited in the next 30 days. That is higher than 50% of all scored CVEs.

Q: How severe is CVE-2023-52558?

CVE-2023-52558 has a CVSS v3 base score of 7.5, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2023-52558 affect?

Published advisories record a fix for openbsd (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

HIGH

7.5

CVSS v3

NVD

Description

In OpenBSD 7.4 before errata 002 and OpenBSD 7.3 before errata 019, a network buffer that had to be split at certain length that could crash the kernel after receiving specially crafted escape sequences.

CWE-131

How to fix

Remediation Available

openbsdNVD

Affected:< 7.3Fixed in:7.3CVE-2023-52558derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

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

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.70%probability of exploitation in 30 days

50thpercentile

Moderate risk: more likely to be exploited than 50% of all known CVEs.

References

Patch3

Related Vulnerabilities

Other CWE-131 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-36824	High	7.4	77%	-	Fix
CVE-2020-8450	High	7.3	72%	-	Fix
CVE-2020-6113	High	7.8	69%	-	-
CVE-2026-42945	Critical	8.1	66%	-	Fix
CVE-2020-6116	High	7.8	28%	-	-
CVE-2005-3120	Critical	9.8	23%	-	Fix

Common questions

How do I fix CVE-2023-52558?

Upgrade openbsd to 7.3 or later.

Is CVE-2023-52558 being actively exploited?

Not that we know of. CVE-2023-52558 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.70% is the estimated probability that it will be exploited in the next 30 days. That is higher than 50% of all scored CVEs.

How severe is CVE-2023-52558?

CVE-2023-52558 has a CVSS v3 base score of 7.5, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2023-52558 affect?

Published advisories record a fix for openbsd (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2023-52558

Markdown

[![CVE-2023-52558](https://tridentstack.com/cve/badge/CVE-2023-52558.svg)](https://tridentstack.com/cve/CVE-2023-52558)

HTML

<a href="https://tridentstack.com/cve/CVE-2023-52558"><img src="https://tridentstack.com/cve/badge/CVE-2023-52558.svg" alt="CVE-2023-52558"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

See how it works Start freeThis CVE lookup is free and always will be.

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 2025-10-10.