USN-8804-1 openssh vulnerabilities

Florian Kohnhäuser discovered that OpenSSH incorrectly handled shell metacharacters in certain usernames. An attacker could possibly use this issue to execute arbitrary commands when certain non-default configurations were used, resulting in arbitrary code execution. This issue only affected Ubun...

openssh security update

An update is available for openssh. This update affects Rocky Linux 10. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list OpenSSH is an SSH protocol implementation supported by a number of Linux,...

RLSA-2026:69129 Important: openssh security update

OpenSSH is an SSH protocol implementation supported by a number of Linux, UNIX, and similar operating systems. It includes the core files necessary for both the OpenSSH client and server. Security Fixes: openssh: OpenSSH: sftp client allows attacker to control downloaded file location...

RLSA-2026:69266 Important: openssh security, bug fix, and enhancement update

OpenSSH is an SSH protocol implementation supported by a number of Linux, UNIX, and similar operating systems. It includes the core files necessary for both the OpenSSH client and server. Security Fixes: openssh: OpenSSH: sftp client allows attacker to control downloaded file location...

openssh security, bug fix, and enhancement update

An update is available for openssh. This update affects Rocky Linux 8. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list OpenSSH is an SSH protocol implementation supported by a number of Linux, UNI...

openssh security update

9.9p1-11.0.1 - Restore pamsshagentrel values that were used for initial release - Fix PerSourcePenalties grace-exceeded using the crash penalty value Orabug: 39825354 - Replace unsupported ML-KEM hybrid algorithm skip logic with v9.9p1-23.el102 ML-KEM/NIST backport Orabug: 39423076 - Upstream...

RockyLinux 9 : openssh (RLSA-2026:69130)

The remote RockyLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:69130 advisory. openssh: OpenSSH: sftp client allows attacker to control downloaded file location CVE-2026-59995 openssh: OpenSSH sshd: Security bypass due to incorrect...

OpenSSH before 10.3 mishandles the authorized_keys principals option in uncommon scenarios

OpenSSH before 10.3 mishandles the authorizedkeys principals option in uncommon scenarios involving a principals list in conjunction with a Certificate Authority that makes certain use of comma characters...

ssh in OpenSSH before 10.4 can have a use-after-free when a server changes its host key during a key re-exchange

ssh in OpenSSH before 10.4 can have a use-after-free when a server changes its host key during a key re-exchange. This outcome occurs only on the client side...

In OpenSSH before 10.3, command execution can occur via shell metacharacters in a username within a command line

In OpenSSH before 10.3, command execution can occur via shell metacharacters in a username within a command line. This requires a scenario where the username on the command line is untrusted, and also requires a non-default configuration of % in sshconfig...

OpenSSH before 10.3 can use unintended ECDSA algorithms

OpenSSH before 10.3 can use unintended ECDSA algorithms. Listing of any ECDSA algorithm in PubkeyAcceptedAlgorithms or HostbasedAcceptedAlgorithms is misinterpreted to mean all ECDSA algorithms...

In OpenSSH before 10.3, a file downloaded by scp -0 as root can lead to privileged escalation

In OpenSSH before 10.3, a file downloaded by scp may be installed setuid or setgid, an outcome contrary to some users' expectations, if the download is performed as root with -O legacy scp protocol and without -p preserve mode...

AlmaLinux 10 : openssh (ALSA-2026:69129)

The remote AlmaLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:69129 advisory. openssh: OpenSSH: sftp client allows attacker to control downloaded file location CVE-2026-59995 openssh: OpenSSH sshd: Security bypass due to incorrect...

RockyLinux 8 : openssh (RLSA-2026:69266)

The remote RockyLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:69266 advisory. openssh: OpenSSH: sftp client allows attacker to control downloaded file location CVE-2026-59995 openssh: OpenSSH sshd: Security bypass due to incorrect...

RockyLinux 10 : openssh (RLSA-2026:69129)

The remote RockyLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:69129 advisory. openssh: OpenSSH: sftp client allows attacker to control downloaded file location CVE-2026-59995 openssh: OpenSSH sshd: Security bypass due to incorrec...

AlmaLinux 9 : openssh (ALSA-2026:69130)

The remote AlmaLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:69130 advisory. openssh: OpenSSH: sftp client allows attacker to control downloaded file location CVE-2026-59995 openssh: OpenSSH sshd: Security bypass due to incorrect...

openssh: OpenSSH sshd: Security bypass due to incorrect handling of forwarding and tunneling options

A flaw was found in sshd, the OpenSSH server daemon. When DisableForwarding=yes is configured to prevent network traffic forwarding, it incorrectly fails to take precedence over PermitTunnel=yes. This allows a remote attacker to bypass intended security restrictions and establish a tunnel,...

openssh: OpenSSH: Tunnel forwarding restriction bypass

A flaw was found in OpenSSH's sshd component. The restrict keyword, designed to limit tunnel forwarding within the authorizedkeys file, was not correctly enforced for tunnel forwarding. This issue could allow a local attacker to bypass intended security restrictions, potentially leading to...

openssh: OpenSSH: Information disclosure and data corruption via use-after-free in ssh client

A flaw was found in OpenSSH. A use-after-free vulnerability exists in the ssh client when handling concurrent remote-forwarding operations. This can occur if a remote forwarding is added via the local session multiplexing socket while a remote forwarding open request is pending with the server. A...

openssh: OpenSSH: ssh-agent allows remote execution of local operations

A flaw was found in OpenSSH's ssh-agent component. A misinteraction between agent locking and the [email protected] extension allows operations intended for local execution to be performed remotely. This could enable a remote attacker to add PKCS11 tokens or utilize keys with destination...