UBUNTU-CVE-2023-28531

Advisory lineage Upstream: 1 Downstream: 1
Upstream
CVE-2023-28531
Downstream
USN-6560-1
Published: 17 Mar 2023, 04:15
Last modified:04 Feb 2026, 03:20

Vulnerability Summary

Overall Risk (default)
high
70/100
CVSS Score
9.8 CRITICAL
3.1 (osv_ubuntu)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

17 Mar 2023, 04:15
Published
Vulnerability first disclosed
04 Feb 2026, 03:20
Last Modified
Vulnerability information updated

Description

ssh-add in OpenSSH before 9.3 adds smartcard keys to ssh-agent without the intended per-hop destination constraints. The earliest affected version is 8.9.

CVSS Metrics

  • v3.1•CRITICAL•Score: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Systems

  • ubuntu•openssh

    < 1:8.9p1-3ubuntu0.5

References (4)