RHSA-2026:12389 Red Hat Security Advisory: openssh security update

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CLSA-2026-1777586051 openssh: Fix of CVE-2026-35386

CVE-2026-35386: fix client-side command execution via control characters in usernames by adding iscntrl rejection to validruser...

CLSA-2026-1777585781 openssh: Fix of CVE-2026-35386

CVE-2026-35386: fix client-side command execution via control characters in usernames by adding iscntrl rejection to validruser...

CLSA-2026-1777567965 openssh: Fix of CVE-2026-35385

CVE-2026-35385: when downloading files as root in legacy -O mode and without the -p preserve modes flag, scp1 did not clear setuid/setgid bits from downloaded files. Backport upstream commit 487e8ac1 to mask out the setuid/setgid bits in this case...

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: openssh security update

An update for openssh is now available for Red Hat Enterprise Linux 10.0 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available fo...

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...

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...

CLSA-2026-1777547626 openssh: Fix of CVE-2026-35385

CVE-2026-35385: clear setuid/setgid bits when downloading files as root in scp legacy -O mode without the -p flag...

CLSA-2026-1777546896 openssh: Fix of CVE-2026-35385

CVE-2026-35385: when downloading files as root in legacy -O mode and without the -p preserve modes flag, scp1 did not clear setuid/setgid bits from downloaded files. Backport upstream commit 487e8ac1 to mask out the setuid/setgid bits in this case...

Amazon Linux 2 : openssh, --advisory ALAS2-2026-3262 (ALAS-2026-3262)

The version of openssh installed on the remote host is prior to 7.4p1-22. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2026-3262 advisory. In OpenSSH before 10.3, a file downloaded by scp may be installed setuid or setgid, an outcome contrary to some users' expectation...

Important: openssh

Issue Overview: 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. CVE-2026-35385 Affected Packages: openssh Note: This...

Important: openssh

Issue Overview: 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. CVE-2026-35385 Affected Packages: openssh Issue...

Ubuntu 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS : OpenSSH vulnerabilities (USN-8222-1)

The remote Ubuntu 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8222-1 advisory. Christos Papakonstantinou discovered that the OpenSSH scp tool incorrectly handled the legacy scp protocol -O option. Thi...

Amazon Linux 2023 : openssh, openssh-clients, openssh-keycat (ALAS2023-2026-1604)

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1604 advisory. 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...

CLSA-2026-1777465438 openssh: Fix of CVE-2026-35414

CVE-2026-35414: fix incorrect matching of the authorizedkeys principals="" option against certificate principals containing comma characters...

CLSA-2026-1777455730 openssh: Fix of CVE-2026-3497

CVE-2026-3497: fix information disclosure or denial of service due to uninitialized variables in GSSAPI key exchange...

CLSA-2026-1777453856 openssh: Fix of CVE-2026-35414

CVE-2026-35414: fix incorrect matching of principals in the authorizedkeys principals="..." option when a certificate principal contains a comma character...

CLSA-2026-1777393442 openssh: Fix of CVE-2026-35414

CVE-2026-35414: fix incorrect matching of principals in the authorizedkeys principals="..." option when a certificate principal contains a comma character...

The vulnerability of the authorized_keys() function in the OpenSSH cryptographic protection mechanism allows a attacker to compromise the confidentiality, integrity, and accessibility of the protected information.

The vulnerability of the authorizedkeys function in the OpenSSH cryptographic security tool is related to the improper implementation of stream control. Exploiting this vulnerability allows a malicious actor to compromise the confidentiality, integrity, and accessibility of the protected...