CVE-2026-6477

설명

Use of inherently dangerous function PQfn(..., result_is_int=0, ...) in PostgreSQL libpq lo_export(), lo_read(), lo_lseek64(), and lo_tell64() functions allows the server superuser to overwrite a client stack buffer with an arbitrarily-large response. Like gets(), PQfn(..., result_is_int=0, ...) stores arbitrary-length, server-determined data into a buffer of unspecified size. Because both the \lo_export command in psql and pg_dump call lo_read(), the server superuser can overwrite pg_dump or psql stack memory. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.

영향 제품·버전

제품 n/a PostgreSQL, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support

영향 버전 n/a PostgreSQL, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support >= 18 < 18.4, >= 17 < 17.10, >= 16 < 16.14, >= 15 < 15.18, < 14.23, >= 15.0 < 15.18, >= 16.0 < 16.14, >= 17.0 < 17.10, >= 18.0 < 18.4

수정 버전 n/a PostgreSQL, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support 14.23, 15.18, 16.14, 17.10, 18.4

기술 정보

CVSS 벡터 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE CWE-120, CWE-242

EPSS 데이터 기준일 2026.07.15