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🛡️ CLSA-2026-1779880647 — libecpg-compat3 (CVE-2026-6473 +5 more)

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Fix of 6 CVEs

  • 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.

Affected software

CLSA-2026-1779880647 is recorded against 14 packages.

  • libecpg-compat3 (fixed in 10.23-0ubuntu0.18.04.2+tuxcare.els6)
  • libecpg-dev (fixed in 10.23-0ubuntu0.18.04.2+tuxcare.els6)
  • libecpg6 (fixed in 10.23-0ubuntu0.18.04.2+tuxcare.els6)
  • libpgtypes3 (fixed in 10.23-0ubuntu0.18.04.2+tuxcare.els6)
  • libpq-dev (fixed in 10.23-0ubuntu0.18.04.2+tuxcare.els6)
  • libpq5 (fixed in 10.23-0ubuntu0.18.04.2+tuxcare.els6)
  • postgresql-10 (fixed in 10.23-0ubuntu0.18.04.2+tuxcare.els6)
  • postgresql-client-10 (fixed in 10.23-0ubuntu0.18.04.2+tuxcare.els6)
  • postgresql-doc-10 (fixed in 10.23-0ubuntu0.18.04.2+tuxcare.els6)
  • postgresql-plperl-10 (fixed in 10.23-0ubuntu0.18.04.2+tuxcare.els6)
  • postgresql-plpython-10 (fixed in 10.23-0ubuntu0.18.04.2+tuxcare.els6)
  • postgresql-plpython3-10 (fixed in 10.23-0ubuntu0.18.04.2+tuxcare.els6)
  • postgresql-pltcl-10 (fixed in 10.23-0ubuntu0.18.04.2+tuxcare.els6)
  • postgresql-server-dev-10 (fixed in 10.23-0ubuntu0.18.04.2+tuxcare.els6)

Timeline and source

Published on 27 May 2026 and last revised on 4 June 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

errata.tuxcare.com (Advisory)

Other advisories for this package

libecpg-compat3 has other advisories on record. If you are patching this one, these are worth checking on the same host:

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2026-05-27
Updated 2026-08-20
Modified 2026-06-04
Fix URL N/A

Affected Packages

Software From version Fixed in
libecpg-compat3 — 10.23-0ubuntu0.18.04.2+tuxcare.els6
libecpg-dev — 10.23-0ubuntu0.18.04.2+tuxcare.els6
libecpg6 — 10.23-0ubuntu0.18.04.2+tuxcare.els6
libpgtypes3 — 10.23-0ubuntu0.18.04.2+tuxcare.els6
libpq-dev — 10.23-0ubuntu0.18.04.2+tuxcare.els6
libpq5 — 10.23-0ubuntu0.18.04.2+tuxcare.els6
postgresql-10 — 10.23-0ubuntu0.18.04.2+tuxcare.els6
postgresql-client-10 — 10.23-0ubuntu0.18.04.2+tuxcare.els6
postgresql-doc-10 — 10.23-0ubuntu0.18.04.2+tuxcare.els6
postgresql-plperl-10 — 10.23-0ubuntu0.18.04.2+tuxcare.els6
postgresql-plpython-10 — 10.23-0ubuntu0.18.04.2+tuxcare.els6
postgresql-plpython3-10 — 10.23-0ubuntu0.18.04.2+tuxcare.els6
postgresql-pltcl-10 — 10.23-0ubuntu0.18.04.2+tuxcare.els6
postgresql-server-dev-10 — 10.23-0ubuntu0.18.04.2+tuxcare.els6

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