{"schema_version": "1.7.0", "id": "RLSA-2026:27738", "modified": "2026-06-24T12:06:13.769197Z", "published": "2026-06-24T12:01:04.194583Z", "upstream": ["CVE-2026-6473", "CVE-2026-6475", "CVE-2026-6477", "CVE-2026-6478"], "summary": "Important: libpq security update", "details": "The libpq package provides the PostgreSQL client library, which allows client programs to connect to PostgreSQL servers. \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:8", "name": "libpq", "purl": "pkg:rpm/rocky-linux/libpq?distro=rocky-linux-8&epoch=0"}, "ranges": [{"type": "ECOSYSTEM", "events": [{"introduced": "0"}, {"fixed": "0:13.23-2.el8_10"}], "database_specific": {"yum_repository": "AppStream"}}]}], "references": [{"type": "ADVISORY", "url": "https://errata.rockylinux.org/RLSA-2026:27738"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2477439"}, {"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"}], "credits": [{"name": "Rocky Enterprise Software Foundation"}, {"name": "Red Hat"}]}