{"id":"RLSA-2026:27742","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.","modified":"2026-06-24T12:30:04.047921494Z","published":"2026-06-24T12:05:09.232192Z","upstream":["CVE-2026-6473","CVE-2026-6475","CVE-2026-6477","CVE-2026-6478"],"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"}],"affected":[{"package":{"name":"postgresql18","ecosystem":"Rocky Linux:10","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"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2026:27742.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}],"credits":[{"name":"Rocky Enterprise Software Foundation"},{"name":"Red Hat"}]}