RLSA-2026:47755

Synopsis

Moderate: openssh security update

Description

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 Fix(es):

* openssh: Local MITM of X11 forwarding via abstract UNIX socket pre-binding in Rocky Linux OpenSSH client versions (CVE-2026-55655)

* openssh: Double free in Rocky Linux versions of OpenSSH DH-GEX client path during FIPS known-group validation leads to client-side denial of service (CVE-2026-55653)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Affected products

Rocky Linux 8 aarch64 Rocky Linux 8 x86_64

Fixes

2462250 2462351

CVEs

CVE-2026-55653 CVE-2026-55655

Affected packages

Rocky Linux 8 aarch64 - BaseOS

pam_ssh_agent_auth-debuginfo-0:0.10.3-7.30.el8_10.aarch64.rpm openssh-0:8.0p1-30.el8_10.aarch64.rpm openssh-0:8.0p1-30.el8_10.src.rpm openssh-cavs-0:8.0p1-30.el8_10.aarch64.rpm openssh-cavs-debuginfo-0:8.0p1-30.el8_10.aarch64.rpm openssh-clients-0:8.0p1-30.el8_10.aarch64.rpm openssh-clients-debuginfo-0:8.0p1-30.el8_10.aarch64.rpm openssh-debuginfo-0:8.0p1-30.el8_10.aarch64.rpm openssh-debugsource-0:8.0p1-30.el8_10.aarch64.rpm openssh-keycat-0:8.0p1-30.el8_10.aarch64.rpm openssh-keycat-debuginfo-0:8.0p1-30.el8_10.aarch64.rpm openssh-ldap-0:8.0p1-30.el8_10.aarch64.rpm openssh-ldap-debuginfo-0:8.0p1-30.el8_10.aarch64.rpm openssh-server-0:8.0p1-30.el8_10.aarch64.rpm openssh-server-debuginfo-0:8.0p1-30.el8_10.aarch64.rpm pam_ssh_agent_auth-0:0.10.3-7.30.el8_10.aarch64.rpm

Rocky Linux 8 x86_64 - BaseOS

pam_ssh_agent_auth-debuginfo-0:0.10.3-7.30.el8_10.x86_64.rpm openssh-0:8.0p1-30.el8_10.src.rpm openssh-0:8.0p1-30.el8_10.x86_64.rpm openssh-cavs-0:8.0p1-30.el8_10.x86_64.rpm openssh-cavs-debuginfo-0:8.0p1-30.el8_10.x86_64.rpm openssh-clients-0:8.0p1-30.el8_10.x86_64.rpm openssh-clients-debuginfo-0:8.0p1-30.el8_10.x86_64.rpm openssh-debuginfo-0:8.0p1-30.el8_10.x86_64.rpm openssh-debugsource-0:8.0p1-30.el8_10.x86_64.rpm openssh-keycat-0:8.0p1-30.el8_10.x86_64.rpm openssh-keycat-debuginfo-0:8.0p1-30.el8_10.x86_64.rpm openssh-ldap-0:8.0p1-30.el8_10.x86_64.rpm openssh-ldap-debuginfo-0:8.0p1-30.el8_10.x86_64.rpm openssh-server-0:8.0p1-30.el8_10.x86_64.rpm openssh-server-debuginfo-0:8.0p1-30.el8_10.x86_64.rpm pam_ssh_agent_auth-0:0.10.3-7.30.el8_10.x86_64.rpm

Rocky Linux 8 aarch64 - AppStream

openssh-askpass-0:8.0p1-30.el8_10.aarch64.rpm openssh-askpass-debuginfo-0:8.0p1-30.el8_10.aarch64.rpm

Rocky Linux 8 x86_64 - AppStream

openssh-askpass-0:8.0p1-30.el8_10.x86_64.rpm openssh-askpass-debuginfo-0:8.0p1-30.el8_10.x86_64.rpm