{"schema_version": "1.7.0", "id": "RLSA-2026:47755", "modified": "2026-07-30T12:08:20.576060Z", "published": "2026-07-30T12:00:53.025496Z", "upstream": ["CVE-2026-55653", "CVE-2026-55655"], "summary": "Moderate: openssh security update", "details": "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.\n\nSecurity Fix(es):\n\n* openssh: Local MITM of X11 forwarding via abstract UNIX socket pre-binding in Rocky Linux OpenSSH client versions (CVE-2026-55655)\n\n* 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)\n\nFor 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.", "severity": [{"type": "CVSS_V3", "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:L/A:N"}], "affected": [{"package": {"ecosystem": "Rocky Linux:8", "name": "openssh", "purl": "pkg:rpm/rocky-linux/openssh?distro=rocky-linux-8&epoch=0"}, "ranges": [{"type": "ECOSYSTEM", "events": [{"introduced": "0"}, {"fixed": "0:8.0p1-30.el8_10"}], "database_specific": {"yum_repository": "BaseOS"}}]}], "references": [{"type": "ADVISORY", "url": "https://errata.rockylinux.org/RLSA-2026:47755"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2462250"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2462351"}], "credits": [{"name": "Rocky Enterprise Software Foundation"}, {"name": "Red Hat"}]}