Description
ssh in OpenSSH before 10.1 allows control characters in usernames that originate from certain possibly untrusted sources, potentially leading to code execution when a ProxyCommand is used. The untrusted sources are the command line and %-sequence expansion of a configuration file. (A configuration file that provides a complete literal username is not categorized as an untrusted source.)
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| OpenBSD | OpenSSH | < 10.1 | 10.1 |
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 | 1:10.1p1-1 | — |
| Debian 13 | openssh | 1:10.0p1-7+deb13u1 | — |
| Debian 12 | openssh | 1:9.2p1-2+deb12u8 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | openssh-ssh1 | No fix yet | — |
| Ubuntu 26.04 LTS | openssh | 1:10.2p1-2ubuntu1 | — |
| Ubuntu 26.04 LTS | openssh-ssh1 | No fix yet | — |
| Ubuntu 25.10 | openssh | 1:10.0p1-5ubuntu5.1 | — |
| Ubuntu 25.10 | openssh-ssh1 | No fix yet | — |
| Ubuntu 24.04 LTS | openssh | 1:9.6p1-3ubuntu13.15 | — |
| Ubuntu 24.04 LTS | openssh-ssh1 | No fix yet | — |
| Ubuntu 22.04 LTS | openssh | 1:8.9p1-3ubuntu0.14 | — |
| Ubuntu 22.04 LTS | openssh-ssh1 | No fix yet | — |
Show 15 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | openssh-ssh1 | No fix yet | — |
| Ubuntu 18.04 LTS | openssh-ssh1 | No fix yet | — |
| Ubuntu Pro FIPS 20.04 LTS | openssh | No fix yet | — |
| Ubuntu Pro FIPS 18.04 LTS | openssh | No fix yet | — |
| Ubuntu Pro FIPS 16.04 LTS | openssh | No fix yet | — |
| Ubuntu Pro FIPS-updates 24.04 LTS | openssh | 1:9.6p1-3ubuntu13.15+Fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | openssh | 1:8.9p1-3ubuntu0.14+Fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | openssh | 1:8.2p1-4ubuntu0.fips.0.13.1 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | openssh | No fix yet | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | openssh | No fix yet | — |
| Ubuntu Pro FIPS-preview 22.04 LTS | openssh | No fix yet | — |
| Ubuntu Pro 20.04 LTS | openssh | 1:8.2p1-4ubuntu0.13+esm1 | — |
| Ubuntu Pro 18.04 LTS | openssh | No fix yet | — |
| Ubuntu Pro 16.04 LTS | openssh | No fix yet | — |
| Ubuntu Pro 14.04 LTS | openssh | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | openssh +5 | 9.9p1-12.el10_1 | RHSA-2025:23479 |
| RHEL 9 | openssh +4 | 8.7p1-47.el9_7 | RHSA-2025:23480 |
| RHEL 9 | pam_ssh_agent_auth | 0.10.4-5.47.el9_7 | RHSA-2025:23480 |
| RHEL 8 | openssh +6 | 8.0p1-27.el8_10 | RHSA-2025:23481 |
| RHEL 8 | pam_ssh_agent_auth | 0.10.3-7.27.el8_10 | RHSA-2025:23481 |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | openssh +5 | 9.9p1-7.el10_0.1 | RHSA-2026:1678 |
| RHEL 9.6 EUS | openssh +4 | 8.7p1-45.el9_6.1 | RHSA-2026:0693 |
| RHEL 9.6 EUS | pam_ssh_agent_auth | 0.10.4-5.45.el9_6 | RHSA-2026:0693 |
| RHEL 9.4 EUS | openssh +4 | 8.7p1-38.el9_4.6 | RHSA-2026:0976 |
| RHEL 9.4 EUS | pam_ssh_agent_auth | 0.10.4-5.38.el9_4.6 | RHSA-2026:0976 |
| RHEL 9.2 E4S | openssh +4 | 8.7p1-30.el9_2.9 | RHSA-2026:1815 |
| RHEL 9.2 E4S | pam_ssh_agent_auth | 0.10.4-5.30.el9_2.9 | RHSA-2026:1815 |
| RHEL 9.0 E4S | openssh +4 | 8.7p1-13.el9_0.1 | RHSA-2026:1790 |
| RHEL 9.0 E4S | pam_ssh_agent_auth | 0.10.4-4.13.el9_0.4 | RHSA-2026:1790 |
| Red Hat Hardened Images 1 | openssh +6 | 10.2p1-9.hum1 | RHSA-2026:5475 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | openssh +5 | 9.9p1-12.el10_1.alma.1 | ALSA-2025:23479 |
| AlmaLinux 9 | openssh +4 | 8.7p1-47.el9_7.alma.1 | ALSA-2025:23480 |
| AlmaLinux 9 | pam_ssh_agent_auth | 0.10.4-5.47.el9_7.alma.1 | ALSA-2025:23480 |
| AlmaLinux 8 | openssh +6 | 8.0p1-27.el8_10 | ALSA-2025:23481 |
| AlmaLinux 8 | pam_ssh_agent_auth | 0.10.3-7.27.el8_10 | ALSA-2025:23481 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | openssh | 9.9p1-12.el10_1.rocky.0.1 | RLSA-2025:23479 |
| Rocky Linux 9 | openssh | 8.7p1-47.el9_7.rocky.0.1 | RLSA-2025:23480 |
| Rocky Linux 8 | openssh | 8.0p1-27.el8_10 | RLSA-2025:23481 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | openssh +1 | 9.6p1-150600.6.34.1 | SUSE-SU-2025:4067-1 |
| SLES 15 SP6 | openssh +1 | 9.6p1-150600.6.34.1 | SUSE-SU-2025:4067-1 |
| SLES 15 SP5 | openssh +1 | 8.4p1-150300.3.57.1 | SUSE-SU-2025:4112-1 |
| SLES 15 SP4 | openssh +1 | 8.4p1-150300.3.57.1 | SUSE-SU-2025:4112-1 |
| SLES 15 SP3 | openssh +1 | 8.4p1-150300.3.57.1 | SUSE-SU-2025:4112-1 |
Show 19 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | openssh +1 | 7.2p2-81.34.1 | SUSE-SU-2025:4097-1 |
| SLES 12 SP5 | openssh8.4 | 8.4p1-8.19.1 | SUSE-SU-2025:4098-1 |
| SLES for SAP 16.0 | openssh +1 | 10.0p2-160000.3.1 | SUSE-SU-2025:21161-1 |
| SLES for SAP 15 SP5 | openssh +1 | 8.4p1-150300.3.57.1 | SUSE-SU-2025:4112-1 |
| SLES for SAP 15 SP4 | openssh +1 | 8.4p1-150300.3.57.1 | SUSE-SU-2025:4112-1 |
| SLES for SAP 15 SP3 | openssh +1 | 8.4p1-150300.3.57.1 | SUSE-SU-2025:4112-1 |
| SLES 16.0 | openssh +1 | 10.0p2-160000.3.1 | SUSE-SU-2025:21161-1 |
| SLE Micro 6.2 | openssh | 10.0p2-160000.3.1 | SUSE-SU-2025:21128-1 |
| SLE Micro 6.1 | openssh | 9.6p1-slfo.1.1_3.1 | SUSE-SU-2026:20662-1 |
| SLE Micro 6.0 | openssh | 9.6p1-4.1 | SUSE-SU-2025:21044-1 |
| SLE Micro 5.5 | openssh | 8.4p1-150300.3.57.1 | SUSE-SU-2025:4112-1 |
| SLE Micro 5.4 | openssh | 8.4p1-150300.3.57.1 | SUSE-SU-2025:4112-1 |
| SLE Micro 5.3 | openssh | 8.4p1-150300.3.57.1 | SUSE-SU-2025:4112-1 |
| SLE Micro 5.2 | openssh | 8.4p1-150300.3.57.1 | SUSE-SU-2025:4112-1 |
| SLE HPC 15 SP5 | openssh +1 | 8.4p1-150300.3.57.1 | SUSE-SU-2025:4112-1 |
| SLE HPC 15 SP4 | openssh +1 | 8.4p1-150300.3.57.1 | SUSE-SU-2025:4112-1 |
| SLE HPC 15 SP3 | openssh +1 | 8.4p1-150300.3.57.1 | SUSE-SU-2025:4112-1 |
| SUSE Manager Server LTS 4.3 | openssh | 8.4p1-150300.3.57.1 | SUSE-SU-2025:4112-1 |
| SUSE Manager Proxy LTS 4.3 | openssh | 8.4p1-150300.3.57.1 | SUSE-SU-2025:4112-1 |
| SUSE Enterprise Storage 7.1 | openssh +1 | 8.4p1-150300.3.57.1 | SUSE-SU-2025:4112-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 16.0 | openssh +1 | 10.0p2-160000.3.1 | openSUSE-SU-2025:20122-1 |
| openSUSE Leap 15.6 | openssh +1 | 9.6p1-150600.6.34.1 | SUSE-SU-2025:4067-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | openssh | 10.1_p1-r0 | — |
| Alpine v3.23 | openssh | 10.1_p1-r0 | — |
| Alpine v3.22 | openssh | 10.0_p1-r10 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | openssh +3 | 8.7p1-8.amzn2023.0.16 | ALAS2023-2026-1441 |
| Amazon Linux 2023 | pam_ssh_agent_auth | 0.10.4-4.8.amzn2023.0.16 | ALAS2023-2026-1441 |
| Amazon Linux 2 | openssh +7 | 7.4p1-22.amzn2.0.11 | ALAS2-2026-3175 |
| Amazon Linux 2 | pam_ssh_agent_auth | 0.10.3-2.22.amzn2.0.11 | ALAS2-2026-3175 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | openssh | 9.8p1-5 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | openssh +5 | 9.9p1-12.0.1.el10_1 | ELSA-2025-23479 |
| Oracle Linux 9 | openssh +4 | 8.7p1-47.0.1.el9_7 | ELSA-2025-23480 |
| Oracle Linux 9 | pam_ssh_agent_auth | 0.10.4-5.47.0.1.el9_7 | ELSA-2025-23480 |
| Oracle Linux 8 | openssh +6 | 8.0p1-27.0.1.el8_10 | ELSA-2025-23481 |
| Oracle Linux 8 | pam_ssh_agent_auth | 0.10.3-7.27.0.1.el8_10 | ELSA-2025-23481 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 2 repositories
-
dgl/cve-2025-61984-poc ★ 7 · Oct 7, 2025
PoC for OpenSSH ProxyCommand CVE-2025-61984
-
flyskyfire/cve-2025-61984-poc ★ 0 · Oct 24, 2025
PoC for CVE-2025-61984
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 38
- RHSA-2026:0693 Red Hat Security Advisory: openssh security update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2025:23479 Red Hat Security Advisory: openssh security update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- 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
- ALSA-2025:23479 Moderate: openssh security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:23480 Moderate: openssh security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:23481 Moderate: openssh security update AlmaLinux Security Advisories · Oct 29, 2026
- ICSA-26-295-11 Siemens SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP CISA ICS & IT advisories · Oct 22, 2026
- WID-SEC-2026-0489 Xerox FreeFlow Print Server: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff BSI CERT-Bund (WID) · Oct 21, 2026
- RHSA-2026:5475 Red Hat Security Advisory: Red Hat Hardened Images RPM Release Red Hat Security Advisories (RHSA) · Oct 16, 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
- WID-SEC-2026-0349 Dell Avamar und NetWorker: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 17, 2026
- RHSA-2026:1815 Red Hat Security Advisory: openssh security update Red Hat Security Advisories (RHSA) · Sep 2, 2026
- RHSA-2026:1790 Red Hat Security Advisory: openssh security update Red Hat Security Advisories (RHSA) · Sep 2, 2026
- RHSA-2026:1678 Red Hat Security Advisory: openssh security update Red Hat Security Advisories (RHSA) · Sep 2, 2026
- RHSA-2026:0976 Red Hat Security Advisory: openssh security update Red Hat Security Advisories (RHSA) · Sep 2, 2026
- RHSA-2025:23480 Red Hat Security Advisory: openssh security update Red Hat Security Advisories (RHSA) · Sep 2, 2026
- RHSA-2025:23481 Red Hat Security Advisory: openssh security update Red Hat Security Advisories (RHSA) · Sep 2, 2026
- WID-SEC-2025-2212 OpenSSH: Mehrere Schwachstellen ermöglichen Codeausführung BSI CERT-Bund (WID) · Sep 1, 2026
- ICSA-26-209-04 Siemens SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP CISA ICS & IT advisories · Jul 28, 2026
- RLSA-2025:23480 Moderate: openssh security update Rocky Linux Security Advisories · May 21, 2026
- RLSA-2025:23479 Moderate: openssh security update Rocky Linux Security Advisories · May 21, 2026
- WID-SEC-2026-0778 Dell Secure Connect Gateway Policy Manager: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 11, 2026
- WID-SEC-2026-1194 Oracle Communications: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 21, 2026
- openSUSE-SU-2025:20122-1 Security update for openssh SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20662-1 Security update for openssh SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:4112-1 Security update for openssh SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:4098-1 Security update for openssh8.4 SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:4067-1 Security update for openssh SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:4097-1 Security update for openssh SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:21161-1 Security update for openssh SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:21128-1 Security update for openssh SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:21044-1 Security update for openssh SUSE / openSUSE Security Updates · Mar 23, 2026
- ALAS2-2026-3175 Low: openssh security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Feb 20, 2026
- ALAS2023-2026-1441 Low: openssh security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Feb 18, 2026
- RLSA-2025:23481 Moderate: openssh security update Rocky Linux Security Advisories · Dec 18, 2025
- ELSA-2025-23480 Moderate: openssh security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Dec 18, 2025
- ELSA-2025-23481 Moderate: openssh security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Dec 18, 2025
- ELSA-2025-23479 Moderate: openssh security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Dec 17, 2025