Is CVE-2023-51384 in the CISA KEV catalog?

No. CVE-2023-51384 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-51384?

CVE-2023-51384 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2023-51384?

CVE-2023-51384 has an EPSS score of 0.43% (34th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-51384?

Upgrade openssh on debian 12 to 1:9.2p1-2+deb12u2 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2023-51384

MEDIUM

5.5

CVSS v3

NVD

Description

In ssh-agent in OpenSSH before 9.6, certain destination constraints can be incompletely applied. When destination constraints are specified during addition of PKCS#11-hosted private keys, these constraints are only applied to the first key, even if a PKCS#11 token returns multiple keys.

CWE-284Improper Access Control

How to fix

Remediation Available

opensshDebian

Fixed in:1:9.2p1-2+deb12u2CVE-2023-51384

Fixed in:1:9.6p1-1CVE-2023-51384

opensshUbuntu

Fixed in:1:8.2p1-4ubuntu0.11USN-6565-1

Fixed in:1:8.9p1-3ubuntu0.6USN-6565-1

Fixed in:1:9.0p1-1ubuntu8.7USN-6565-1

Fixed in:1:9.3p1-1ubuntu3.2USN-6565-1

openssh-clientUbuntu

Fixed in:1:8.2p1-4ubuntu0.11USN-6565-1

Fixed in:1:8.9p1-3ubuntu0.6USN-6565-1

Fixed in:1:9.0p1-1ubuntu8.7USN-6565-1

Fixed in:1:9.3p1-1ubuntu3.2USN-6565-1

openssh-serverUbuntu

Fixed in:1:8.2p1-4ubuntu0.11USN-6565-1

Fixed in:1:8.9p1-3ubuntu0.6USN-6565-1

Fixed in:1:9.0p1-1ubuntu8.7USN-6565-1

Fixed in:1:9.3p1-1ubuntu3.2USN-6565-1

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 VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.43%probability of exploitation in 30 days

34thpercentile

Low risk: more likely to be exploited than 34% of all known CVEs.

References

Patch1

github.com

Third-Party Advisory4

Mailing List1

openwall.com

Release Notes1

openssh.com

Other references3

Related Vulnerabilities

Other CWE-284 (Improper Access Control) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-27350	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2019-1653	High	7.5	100%	KEV	-
CVE-2023-23752	Medium	5.3	100%	KEV	Fix
CVE-2023-29298	High	7.5	100%	KEV	-
CVE-2023-38205	High	7.5	100%	KEV	-
CVE-2024-27348	Critical	9.8	99%	KEV	Fix

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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 2026-05-28.