{"schema_version": "1.7.0", "id": "RLSA-2026:27742", "modified": "2026-06-24T12:06:22.017050Z", "published": "2026-06-24T12:05:09.232192Z", "upstream": ["CVE-2026-6473", "CVE-2026-6475", "CVE-2026-6477", "CVE-2026-6478"], "summary": "Important: postgresql18 security update", "details": "PostgreSQL is an advanced Object-Relational database management system (DBMS). The base postgresql package contains the client programs that you'll need to access a PostgreSQL DBMS server, as well as HTML documentation for the whole system.  These client programs can be located on the same machine as the PostgreSQL server, or on a remote machine that accesses a PostgreSQL server over a network connection.  The PostgreSQL server can be found in the postgresql-server sub-package.\n\nSecurity Fix(es):\n\n* postgresql: PostgreSQL: Operating system account hijack via symlink following in pg_basebackup and pg_rewind (CVE-2026-6475)\n\n* postgresql: PostgreSQL libpq: Buffer overflow allows server superuser to overwrite client stack memory (CVE-2026-6477)\n\n* postgresql: PostgreSQL: Credential recovery via covert timing channel in MD5 password comparison (CVE-2026-6478)\n\n* postgresql: integer overflow can cause an undersized allocation and an out-of-bounds write (CVE-2026-6473)\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:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}], "affected": [{"package": {"ecosystem": "Rocky Linux:10", "name": "postgresql18", "purl": "pkg:rpm/rocky-linux/postgresql18?distro=rocky-linux-10&epoch=0"}, "ranges": [{"type": "ECOSYSTEM", "events": [{"introduced": "0"}, {"fixed": "0:18.4-1.el10_2"}], "database_specific": {"yum_repository": "AppStream"}}]}], "references": [{"type": "ADVISORY", "url": "https://errata.rockylinux.org/RLSA-2026:27742"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2477442"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2477447"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2477448"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2477439"}], "credits": [{"name": "Rocky Enterprise Software Foundation"}, {"name": "Red Hat"}]}