{"id":"ALSA-2026:27738","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  * postgresql: PostgreSQL libpq: Buffer overflow allows server superuser to overwrite client stack memory (CVE-2026-6477)\n  * postgresql: PostgreSQL: Credential recovery via covert timing channel in MD5 password comparison (CVE-2026-6478)\n  * postgresql: integer overflow can cause an undersized allocation and an out-of-bounds write (CVE-2026-6473)\n\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","modified":"2026-06-23T15:29:23.833612387Z","published":"2026-06-22T00:00:00Z","related":["CVE-2026-6473","CVE-2026-6475","CVE-2026-6477","CVE-2026-6478"],"references":[{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:27738"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-6473"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-6475"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-6477"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-6478"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2477439"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2477442"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2477447"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2477448"},{"type":"ADVISORY","url":"https://errata.almalinux.org/8/ALSA-2026-27738.html"}],"affected":[{"package":{"name":"libpq","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/libpq"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"13.23-2.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:27738.json"}},{"package":{"name":"libpq-devel","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/libpq-devel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"13.23-2.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:27738.json"}}],"schema_version":"1.7.5"}