RHSA-2026:3730 - Security Advisory

Topic

An update for postgresql is now available for Red Hat Enterprise Linux 9.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

PostgreSQL is an advanced object-relational database management system (DBMS).

Security Fix(es):

• postgresql: PostgreSQL missing validation of multibyte character length executes arbitrary code (CVE-2026-2006)
• postgresql: PostgreSQL intarray missing validation of type of input to selectivity estimator executes arbitrary code (CVE-2026-2004)
• postgresql: PostgreSQL pgcrypto heap buffer overflow executes arbitrary code (CVE-2026-2005)

For 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.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux for x86_64 9 x86_64
• Red Hat Enterprise Linux for IBM z Systems 9 s390x
• Red Hat Enterprise Linux for Power, little endian 9 ppc64le
• Red Hat Enterprise Linux for ARM 64 9 aarch64
• Red Hat CodeReady Linux Builder for x86_64 9 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian 9 ppc64le
• Red Hat CodeReady Linux Builder for ARM 64 9 aarch64
• Red Hat CodeReady Linux Builder for IBM z Systems 9 s390x

Fixes

• BZ - 2439324 - CVE-2026-2006 postgresql: PostgreSQL missing validation of multibyte character length executes arbitrary code
• BZ - 2439325 - CVE-2026-2004 postgresql: PostgreSQL intarray missing validation of type of input to selectivity estimator executes arbitrary code
• BZ - 2439326 - CVE-2026-2005 postgresql: PostgreSQL pgcrypto heap buffer overflow executes arbitrary code

CVEs

• CVE-2026-2003
• CVE-2026-2004
• CVE-2026-2005
• CVE-2026-2006

References

• https://access.redhat.com/security/updates/classification/#important