CVE-2023-51384

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.

CVSS 3.1

5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS

0.4% chance of exploitation in the next 30 days; higher than 36% of CVEs (scores of 2026-10-25)

CWE

CWE-284

Published

2023-12-18

Modified

2026-10-15

Record from

the NVD, synced 2026-10-19

Affected

• debian:debian_linux
• openbsd:openssh

References

• http://seclists.org/fulldisclosure/2024/Mar/21
• https://github.com/openssh/openssh-portable/commit/881d9c6af9da4257c69c327c4e2f1508b2fa754b
• https://security.netapp.com/advisory/ntap-20240105-0005/
• https://support.apple.com/kb/HT214084
• https://www.debian.org/security/2023/dsa-5586

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