* SECURITY UPDATE: postgresql May-2026 CVE batch - debian/patches/CVE-2026-6473.patch: integer overflow fixes across multiple vulnerable sites: hstore_plperl/hstore_plpython palloc sizing (mul_size), array_agg() nitems overflow, intarray/ltxtquery findoprnd() left-offset overflow, ltree lquery numvar/totallen overflow, and ts_headline option length overflow. - debian/patches/CVE-2026-6474.patch: guard pg_strftime() callers and ensure null-terminated output on overflow, plus split timeofday() pg_strftime so the %Z timezone string is never embedded as a format string in subsequent snprintf(). - debian/patches/CVE-2026-6475.patch: prevent path traversal in pg_rewind file operations via path_is_safe_for_extraction() helper. - debian/patches/CVE-2026-6477.patch: harden PQfn()/pqFunctionCall3() against server-controlled buffer overruns in libpq large-object interface. - debian/patches/CVE-2026-6478.patch: add timingsafe_bcmp() helper and apply to MD5/SCRAM/RADIUS/plain auth-paths to prevent timing-channel leaks. - debian/patches/CVE-2026-6637.patch: switch refint contrib check_foreign_key to StringInfo and quote_literal_cstr() to prevent SQL injection and stack buffer overruns. - CVE-2026-6473 - CVE-2026-6474 - CVE-2026-6475 - CVE-2026-6477 - CVE-2026-6478 - CVE-2026-6637 * debian/patches/fix-regress-tzdata-LMT.patch: refresh src/test/regress expected output for date, timestamptz and horology tests so that they match the LMT abbreviation emitted by current tzdata for pre-1883 America/Los_Angeles dates.