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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | openssh | 1:9.3p1-1 | — |
| Debian 13 | openssh | 1:9.3p1-1 | — |
| Debian 12 | openssh | 1:9.2p1-2+deb12u2 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | openssh | 1:8.9p1-3ubuntu0.5 | USN-6560-1 |
| Ubuntu 20.04 LTS | openssh | 1:8.2p1-4ubuntu0.10 | USN-6560-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.17 | openssh | 9.1_p1-r3 | — |
| Alpine v3.16 | openssh | 9.0_p1-r3 | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | openssh | 8.9p1-5 | — |
Advisories 10
- SSA-457936 SSA-457936: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP V3.1.7 Siemens ProductCERT · Nov 10, 2026
- ICSA-26-295-11 Siemens SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP CISA ICS & IT advisories · Oct 22, 2026
- SSA-019113 SSA-019113: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP V3.1.6 Siemens ProductCERT · Oct 13, 2026
- SSA-082556 SSA-082556: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP V3.1.5 Siemens ProductCERT · Oct 13, 2026
- ICSA-26-209-04 Siemens SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP CISA ICS & IT advisories · Jul 28, 2026
- WID-SEC-2023-0670 OpenSSH: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 13, 2026
- ICSA-25-162-05 Siemens SIMATIC S7-1500 CPU family CISA ICS & IT advisories · May 14, 2026
- USN-6560-1 openssh vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- NCSC-2025-0187 Kwetsbaarheden verholpen in Siemens producten NCSC-NL (Netherlands) · Jun 10, 2025
- WID-SEC-2024-1082 Juniper JUNOS: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 9, 2024
References
- https://www.openwall.com/lists/oss-security/2023/03/15/8
- https://security.netapp.com/advisory/ntap-20230413-0008/
- GLSA-202307-01 vendor-advisory
- DSA-5586 vendor-advisory
- FEDORA-2024-2aac54ebb7 vendor-advisory