CVE-2026-55655 Openssh: local mitm of x11 forwarding via abstract unix socket pre-binding in red hat enterprise linux openssh client versions

A flaw was found in OpenSSH. A local unprivileged attacker on a Linux client host can hijack client-side X11 forwarding connections. This is possible by pre-binding the preferred abstract X socket name when X11 forwarding is enabled and a local UNIX-domain X socket is used. A successful attack ca...

CVE-2026-55655

A flaw was found in OpenSSH. A local unprivileged attacker on a Linux client host can hijack client-side X11 forwarding connections. This is possible by pre-binding the preferred abstract X socket name when X11 forwarding is enabled and a local UNIX-domain X socket is used. A successful attack ca...

CVE-2026-55653

CVE-2026-55653 affects OpenSSH and describes a double-free in the DH-GEX client path during FIPS known-group validation, allowing a malicious SSH server to terminate the client process and cause a Denial of Service. The issue is tied to processing attacker-controlled DH-GEX group parameters and i...

EUVD-2026-38412

A flaw was found in OpenSSH. A malicious SSH server can exploit a double free vulnerability in the Diffie-Hellman Group Exchange DH-GEX client path. This occurs during FIPS Federal Information Processing Standards mode known-group validation when the client processes attacker-controlled DH-GEX...

CVE-2026-55653 Openssh: double free in red hat enterprise linux versions of openssh dh-gex client path during fips known-group validation leads to client-side denial of service

A flaw was found in OpenSSH. A malicious SSH server can exploit a double free vulnerability in the Diffie-Hellman Group Exchange DH-GEX client path. This occurs during FIPS Federal Information Processing Standards mode known-group validation when the client processes attacker-controlled DH-GEX...

CVE-2026-55653

A flaw was found in OpenSSH. A malicious SSH server can exploit a double free vulnerability in the Diffie-Hellman Group Exchange DH-GEX client path. This occurs during FIPS Federal Information Processing Standards mode known-group validation when the client processes attacker-controlled DH-GEX...

CVE-2026-55653 Openssh: double free in red hat enterprise linux versions of openssh dh-gex client path during fips known-group validation leads to client-side denial of service

A flaw was found in OpenSSH. A malicious SSH server can exploit a double free vulnerability in the Diffie-Hellman Group Exchange DH-GEX client path. This occurs during FIPS Federal Information Processing Standards mode known-group validation when the client processes attacker-controlled DH-GEX...

CVE-2026-55653

A flaw was found in OpenSSH. A malicious SSH server can exploit a double free vulnerability in the Diffie-Hellman Group Exchange DH-GEX client path. This occurs during FIPS Federal Information Processing Standards mode known-group validation when the client processes attacker-controlled DH-GEX...

CVE-2026-55655

A flaw was found in OpenSSH. A local unprivileged attacker on a Linux client host can hijack client-side X11 forwarding connections. This is possible by pre-binding the preferred abstract X socket name when X11 forwarding is enabled and a local UNIX-domain X socket is used. A successful attack ca...

CVE-2026-55653

A flaw was found in OpenSSH. A malicious SSH server can exploit a double free vulnerability in the Diffie-Hellman Group Exchange DH-GEX client path. This occurs during FIPS Federal Information Processing Standards mode known-group validation when the client processes attacker-controlled DH-GEX...

Oracle Linux 9 : openssh (ELSA-2026-19219)

The remote Oracle Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-19219 advisory. - CVE-2026-3497: Fix information disclosure or denial of service due to uninitialized variables in gssapi-keyex Resolves: RHEL-155825 - CVE-2025-61984...

Linux Distros Unpatched Vulnerability : CVE-2026-55654

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - A flaw was found in OpenSSH. This vulnerability, a heap out-of-bounds read, occurs during the cleanup of GSSAPI Generic Security Service Application Programming...

Linux Distros Unpatched Vulnerability : CVE-2026-55653

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - A flaw was found in OpenSSH. A malicious SSH server can exploit a double free vulnerability in the Diffie- Hellman Group Exchange DH-GEX client path. This occur...

Linux Distros Unpatched Vulnerability : CVE-2026-55655

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - A flaw was found in OpenSSH. A local unprivileged attacker on a Linux client host can hijack client-side X11 forwarding connections. This is possible by...

SUSE SLES12 Security Update : openssh8.4 (SUSE-SU-2026:2430-1)

The remote SUSE Linux SLES12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:2430-1 advisory. This update for openssh8.4 fixes the following issues - CVE-2026-3497: Information disclosure or denial of service due to uninitialized variabl...

Oracle Linux 7 : openssh (ELSA-2026-22468)

The remote Oracle Linux 7 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2026-22468 advisory. 7.4p1-23.0.5 - Fix privilege escalation via scp legacy protocol when not in preserving file mode CVE-2026-35385Orabug: 39480251 Tenable has extracted the...

Security Bulletin: OpenSSH client bug (CVE-2016-0777 and CVE-2016-0778)

Question Security Bulletin: OpenSSH client bug CVE-2016-0777 and CVE-2016-0778 "Business Unit":"code":"BU059","label":"IBM Software w/o TPS","Product":"code":"SS8NDZ","label":"IBM Aspera","Component":"","Platform":"code":"PF025","label":"Platform Independent","Version":"All...

Critical: Red Hat Security Advisory: OpenShift Container Platform 4.18.44 bug fix and security update

Red Hat OpenShift Container Platform release 4.18.44 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 4.18. Red Hat Product Security has rated this update as having a...

Junior Hacker Used Tailscale and OpenSSH to Keep Access After His C2 Went Offline

A French-speaking attacker broke into a small French automotive business, planted a keylogger, and stole banking and email credentials. Ordinary stuff, until one move near the end. Before his command-and-control server went dark, he installed OpenSSH and Tailscale on a victim's machine, building ...

Security update for openssh8.4

This update for openssh8.4 fixes the following issues CVE-2026-3497: Information disclosure or denial of service due to uninitialized variables bsc1259642. CVE-2026-35385: a file downloaded by scp may be installed setuid or setgid bsc1261427. CVE-2026-35388: omitted connection multiplexing...