Description
ssh in OpenSSH before 10.1 allows the '\0' character in an ssh:// URI, potentially leading to code execution when a ProxyCommand is used.
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 12 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 | — |
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 | 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 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | openssh | 9.8p1-5 | — |
| Azure Linux 2 (CBL-Mariner) | openssh | 8.9p1-9 | — |
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 |
Advisories 35
- 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-2026:0693 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
- RHSA-2025:23479 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
- 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-2025:21161-1 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
- 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