RHSA-2026:21298 Red Hat Security Advisory: openssh security update

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RockyLinux 9 : openssh (RLSA-2026:19219)

The remote RockyLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:19219 advisory. OpenSSH: OpenSSH: Privilege escalation via scp legacy protocol when not preserving file mode CVE-2026-35385 OpenSSH: OpenSSH: Security bypass via...

OpenSSH: OpenSSH: Low integrity impact from unconfirmed proxy-mode multiplexing sessions

A flaw was found in OpenSSH. This vulnerability allows for a low integrity impact due to the omission of connection multiplexing confirmation for proxy-mode multiplexing sessions. A local user, under specific and complex conditions requiring user interaction, could potentially establish a...

OpenSSH: OpenSSH: Information disclosure due to unintended cryptographic algorithm usage

A flaw was found in OpenSSH. This vulnerability allows the system to use unintended Elliptic Curve Digital Signature Algorithm ECDSA algorithms. This occurs because the configuration for accepted public key algorithms is misinterpreted, leading to the use of weaker cryptographic methods than...

Important: Red Hat Security Advisory: openssh security update

An update for openssh is now available for Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions, and Red Hat Enterprise Linux 8.6 Telecommunications Update Service. Red Hat Product Security has rated this update as...

OpenSSH: OpenSSH: Privilege escalation via scp legacy protocol when not preserving file mode

A flaw was found in OpenSSH. When the scp command is used by a root user to download a file with the legacy protocol option -O and without preserving original file permissions -p, the downloaded file can be installed with elevated privileges setuid or setgid. This unexpected behavior could allow ...

Important: Red Hat Security Advisory: OpenShift Container Platform 4.19.32 bug fix and security update

Red Hat OpenShift Container Platform release 4.19.32 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red Hat OpenShift Container Platform 4.19. Red Hat Product Security has rated this update as having a...

OpenSSH: OpenSSH: Low integrity impact from unconfirmed proxy-mode multiplexing sessions

A flaw was found in OpenSSH. This vulnerability allows for a low integrity impact due to the omission of connection multiplexing confirmation for proxy-mode multiplexing sessions. A local user, under specific and complex conditions requiring user interaction, could potentially establish a...

OpenSSH: OpenSSH: Security bypass via mishandling of authorized_keys principals option

A flaw was found in OpenSSH. This vulnerability arises from the incorrect handling of the authorizedkeys principals option in uncommon scenarios. Specifically, when a principals list is used with a Certificate Authority that includes comma characters, OpenSSH may misinterpret the input. This coul...

OpenSSH: OpenSSH: Arbitrary command execution via shell metacharacters in username

A flaw was found in OpenSSH. This vulnerability allows a remote attacker to achieve arbitrary command execution by injecting shell metacharacters into a username provided on the command line. Exploitation requires an untrusted username and a non-default configuration of the '%' character in...

Amazon Linux 2 : openssh, --advisory ALAS2-2026-3320 (ALAS-2026-3320)

The version of openssh installed on the remote host is prior to 7.4p1-22. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2026-3320 advisory. OpenSSH before 10.3 omits connection multiplexing confirmation for proxy-mode multiplexing sessions. CVE-2026-35388 OpenS...

Medium: openssh

Issue Overview: OpenSSH before 10.3 omits connection multiplexing confirmation for proxy-mode multiplexing sessions. CVE-2026-35388 OpenSSH before 10.3 mishandles the authorizedkeys principals option in uncommon scenarios involving a principals list in conjunction with a Certificate Authority tha...

Medium: openssh

Issue Overview: Vulnerability in the OpenSSH GSSAPI delta included in various Linux distributions. This vulnerability affects the GSSAPI patches added by various Linux distributions and does not affect the OpenSSH upstream project itself. The usage of sshpktdisconnect on an error, which does not...

SUSE SLES15 Security Update : openssh (SUSE-SU-2026:2024-1)

The remote SUSE Linux SLES15 / SLESSAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:2024-1 advisory. This update for openssh fixes the following issues Tenable has extracted the preceding description block directly from the SUSE...

SUSE SLES12 Security Update : openssh (SUSE-SU-2026:2025-1)

The remote SUSE Linux SLES12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:2025-1 advisory. This update for openssh fixes the following issues Tenable has extracted the preceding description block directly from the SUSE security...

SUSE CVE-2026-39832

When adding a key to a remote agent constraint extensions such as [email protected] were not serialized in the request. Destination restrictions were silently stripped when forwarding keys, allowing unrestricted use of the key on the remote host. The client now serializes all...

AZL-87200 CVE-2026-39832 affecting package buildah 1.43.1-3

When adding a key to a remote agent constraint extensions such as [email protected] were not serialized in the request. Destination restrictions were silently stripped when forwarding keys, allowing unrestricted use of the key on the remote host. The client now serializes all...

CVE-2026-39831

The Verify() method in the Go programming language (specifically within golang.org/x/crypto/ssh) fails to check the User Presence flag for FIDO/U2F security key types ([email protected] and [email protected] ). This flaw allows signatures generated without physical touch...

CVE-2026-39831 Invoking bypass of FIDO/U2F security keys physical interaction in golang.org/x/crypto/ssh

The Verify method for FIDO/U2F security key types [email protected], [email protected] did not check the User Presence flag. Signatures generated without physical touch were accepted, allowing unattended use of a hardware security key. To restore the previous behavior,...

CVE-2026-39831 Invoking bypass of FIDO/U2F security keys physical interaction in golang.org/x/crypto/ssh

The Verify method for FIDO/U2F security key types [email protected], [email protected] did not check the User Presence flag. Signatures generated without physical touch were accepted, allowing unattended use of a hardware security key. To restore the previous behavior,...