{"schema_version": "1.7.0", "id": "RLSA-2026:18683", "modified": "2026-05-28T15:44:30.160432Z", "published": "2026-05-28T15:43:06.024531Z", "upstream": ["CVE-2025-4877", "CVE-2025-4878", "CVE-2025-5351", "CVE-2025-8114", "CVE-2025-8277", "CVE-2026-0964", "CVE-2026-0965", "CVE-2026-0966", "CVE-2026-0967", "CVE-2026-0968"], "summary": "Moderate: libssh security update", "details": "libssh is a library which implements the SSH protocol. It can be used to implement client and server applications.\n\nSecurity Fix(es):\n\n* libssh: Double Free Vulnerability in libssh Key Export Functions (CVE-2025-5351)\n\n* libssh: Use of uninitialized variable in privatekey_from_file() (CVE-2025-4878)\n\n* libssh: Write beyond bounds in binary to base64 conversion functions (CVE-2025-4877)\n\n* libssh: NULL Pointer Dereference in libssh KEX Session ID Calculation (CVE-2025-8114)\n\n* libssh: Memory Exhaustion via Repeated Key Exchange in libssh (CVE-2025-8277)\n\n* libssh: Buffer underflow in ssh_get_hexa() on invalid input (CVE-2026-0966)\n\n* libssh: Improper sanitation of paths received from SCP servers (CVE-2026-0964)\n\n* libssh: libssh: Denial of Service via improper configuration file handling (CVE-2026-0965)\n\n* libssh: libssh: Denial of Service via inefficient regular expression processing (CVE-2026-0967)\n\n* libssh: libssh: Denial of Service due to malformed SFTP message (CVE-2026-0968)\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.\n\nAdditional Changes:\n\nFor detailed information on changes in this release, see the Rocky Linux 9 Release Notes linked from the References section.", "severity": [{"type": "CVSS_V3", "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}], "affected": [{"package": {"ecosystem": "Rocky Linux:9", "name": "libssh", "purl": "pkg:rpm/rocky-linux/libssh?distro=rocky-linux-9&epoch=0"}, "ranges": [{"type": "ECOSYSTEM", "events": [{"introduced": "0"}, {"fixed": "0:0.10.4-18.el9"}], "database_specific": {"yum_repository": "BaseOS"}}]}], "references": [{"type": "ADVISORY", "url": "https://errata.rockylinux.org/RLSA-2026:18683"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2369367"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2376184"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2376193"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2383220"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2383888"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2433121"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2436979"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2436980"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2436981"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2436982"}], "credits": [{"name": "Rocky Enterprise Software Foundation"}, {"name": "Red Hat"}]}