Description
In sshd in OpenSSH before 10.0, the DisableForwarding directive does not adhere to the documentation stating that it disables X11 and agent forwarding.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| OpenBSD | OpenSSH | 7.4 – < 10.0 | 10.0 |
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 | 1:10.0p1-1 | — |
| Debian 13 | openssh | 1:10.0p1-1 | — |
| Debian 12 | openssh | 1:9.2p1-2+deb12u6 | — |
| Debian 11 | openssh | 1:8.4p1-5+deb11u5 | DLA-4156-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | openssh-ssh1 | No fix yet | — |
| Ubuntu 26.04 LTS | openssh-ssh1 | No fix yet | — |
| Ubuntu 25.10 | openssh | 1:9.9p1-3ubuntu3.1 | — |
| Ubuntu 25.10 | openssh-ssh1 | No fix yet | — |
| Ubuntu 24.04 LTS | openssh | 1:9.6p1-3ubuntu13.11 | USN-7457-1 |
| Ubuntu 24.04 LTS | openssh-ssh1 | No fix yet | — |
| Ubuntu 22.04 LTS | openssh | 1:8.9p1-3ubuntu0.13 | USN-7457-1 |
| Ubuntu 22.04 LTS | openssh-ssh1 | No fix yet | — |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | openssh | 1:8.2p1-4ubuntu0.13 | USN-7457-1 |
| 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-updates 24.04 LTS | openssh | 1:9.6p1-3ubuntu13.12+Fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | openssh | 1:8.9p1-3ubuntu0.13+Fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | openssh | 1:8.2p1-4ubuntu0.fips.0.13 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | openssh | No fix yet | — |
| Ubuntu Pro FIPS-preview 22.04 LTS | openssh | No fix yet | — |
| Ubuntu Pro 18.04 LTS | openssh | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | openssh +5 | 9.9p1-11.el10 | RHSA-2025:20126 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | openssh +5 | 9.9p1-11.el10.alma.1 | ALSA-2025:20126 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | openssh | 9.9p1-11.el10.rocky.0.1 | RLSA-2025:20126 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | openssh +1 | 9.6p1-150600.6.26.1 | SUSE-SU-2025:01638-2 |
| SLES 15 SP6 | openssh +1 | 9.6p1-150600.6.26.1 | SUSE-SU-2025:01638-1 |
| SLES 15 SP5 | openssh +1 | 8.4p1-150300.3.49.1 | SUSE-SU-2025:1576-1 |
| SLES 15 SP4 | openssh +1 | 8.4p1-150300.3.49.1 | SUSE-SU-2025:1576-1 |
| SLES 15 SP3 | openssh +1 | 8.4p1-150300.3.49.1 | SUSE-SU-2025:1576-1 |
Show 15 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP5 | openssh +1 | 8.4p1-150300.3.49.1 | SUSE-SU-2025:1576-1 |
| SLES for SAP 15 SP4 | openssh +1 | 8.4p1-150300.3.49.1 | SUSE-SU-2025:1576-1 |
| SLES for SAP 15 SP3 | openssh +1 | 8.4p1-150300.3.49.1 | SUSE-SU-2025:1576-1 |
| SLE Micro 6.0 | openssh | 9.6p1-6.1 | SUSE-SU-2026:23249-1 |
| SLE Micro 5.5 | openssh | 8.4p1-150300.3.49.1 | SUSE-SU-2025:1576-1 |
| SLE Micro 5.4 | openssh | 8.4p1-150300.3.49.1 | SUSE-SU-2025:1576-1 |
| SLE Micro 5.3 | openssh | 8.4p1-150300.3.49.1 | SUSE-SU-2025:1576-1 |
| SLE Micro 5.2 | openssh | 8.4p1-150300.3.49.1 | SUSE-SU-2025:1576-1 |
| SLE Micro 5.1 | openssh | 8.4p1-150300.3.49.1 | SUSE-SU-2025:1576-1 |
| SLE HPC 15 SP5 | openssh +1 | 8.4p1-150300.3.49.1 | SUSE-SU-2025:1576-1 |
| SLE HPC 15 SP4 | openssh +1 | 8.4p1-150300.3.49.1 | SUSE-SU-2025:1576-1 |
| SLE HPC 15 SP3 | openssh +1 | 8.4p1-150300.3.49.1 | SUSE-SU-2025:1576-1 |
| SUSE Manager Server 4.3 | openssh | 8.4p1-150300.3.49.1 | SUSE-SU-2025:1576-1 |
| SUSE Manager Proxy 4.3 | openssh | 8.4p1-150300.3.49.1 | SUSE-SU-2025:1576-1 |
| SUSE Enterprise Storage 7.1 | openssh +1 | 8.4p1-150300.3.49.1 | SUSE-SU-2025:1576-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | openssh | 10.0p2-2.1 | openSUSE-SU-2025:15091-1 |
| openSUSE Leap 15.6 | openssh +1 | 9.6p1-150600.6.26.1 | SUSE-SU-2025:01638-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | openssh | 10.0_p1-r0 | — |
| Alpine v3.23 | openssh | 10.0_p1-r0 | — |
| Alpine v3.22 | openssh | 10.0_p1-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | openssh +3 | 8.7p1-8.amzn2023.0.15 | ALAS2023-2025-1038 |
| Amazon Linux 2023 | pam_ssh_agent_auth | 0.10.4-4.8.amzn2023.0.15 | ALAS2023-2025-1038 |
| 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 | 9.8p1-4 | — |
| Azure Linux 2 (CBL-Mariner) | openssh | 8.9p1-8 | — |
Advisories 20
- ALSA-2025:20126 Moderate: openssh security update AlmaLinux Security Advisories · Oct 29, 2026
- WID-SEC-2026-0489 Xerox FreeFlow Print Server: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff BSI CERT-Bund (WID) · Oct 21, 2026
- SSA-398330 SSA-398330: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP >= V3.1.0 and < V3.1.5 Siemens ProductCERT · Oct 13, 2026
- WID-SEC-2025-1439 Dell Secure Connect Gateway: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff BSI CERT-Bund (WID) · Oct 11, 2026
- RHSA-2025:20126 Red Hat Security Advisory: openssh security update Red Hat Security Advisories (RHSA) · Sep 2, 2026
- SUSE-SU-2026:23249-1 Security update for openssh SUSE / openSUSE Security Updates · Aug 27, 2026
- WID-SEC-2025-0775 OpenSSH: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen BSI CERT-Bund (WID) · Aug 26, 2026
- RLSA-2025:20126 Moderate: openssh security update Rocky Linux Security Advisories · May 21, 2026
- USN-7457-1 openssh vulnerability Ubuntu Security Notices (USN) · Apr 27, 2026
- openSUSE-SU-2025:15091-1 openssh-10.0p2-2.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:01638-2 Security update for openssh SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:01638-1 Security update for openssh SUSE / openSUSE Security Updates · Mar 23, 2026
- DLA-4156-1 openssh - security update Debian Security (DSA / DLA) · Mar 9, 2026
- ALAS2-2026-3175 Low: openssh security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Feb 20, 2026
- ALAS2023-2025-1038 Low: openssh security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Feb 10, 2026
- SUSE-SU-2025:1576-1 Security update for openssh SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2025-2361 Oracle Communications: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 17, 2025
- NCSC-2025-0330 Kwetsbaarheden verholpen in Oracle Communications producten NCSC-NL (Netherlands) · Oct 23, 2025
- NCSC-2025-0246 Kwetsbaarheden verholpen in Siemens producten NCSC-NL (Netherlands) · Aug 12, 2025
- ICSA-23-348-10 Siemens SIMATIC S7-1500 CISA ICS & IT advisories · Aug 12, 2025
References
- https://lists.mindrot.org/pipermail/openssh-unix-dev/2025-April/041879.html
- https://www.openssh.com/txt/release-10.0
- https://github.com/openssh/openssh-portable/commit/fc86875e6acb36401dfc1dfb6b628a9d1460f367
- https://ftp.openbsd.org/pub/OpenBSD/patches/7.6/common/013_ssh.patch.sig
- https://www.openssh.com/txt/release-7.4