RHSA-2026:3887 - Security Advisory

Topic

An update for postgresql16 is now available for Red Hat Enterprise Linux 10.

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). The base postgresql package contains the client programs that you'll need to access a PostgreSQL DBMS server, as well as HTML documentation for the whole system. These client programs can be located on the same machine as the PostgreSQL server, or on a remote machine that accesses a PostgreSQL server over a network connection. The PostgreSQL server can be found in the postgresql-server sub-package.

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 10 x86_64
• Red Hat Enterprise Linux for IBM z Systems 10 s390x
• Red Hat Enterprise Linux for Power, little endian 10 ppc64le
• Red Hat Enterprise Linux for ARM 64 10 aarch64
• Red Hat CodeReady Linux Builder for x86_64 10 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian 10 ppc64le
• Red Hat CodeReady Linux Builder for ARM 64 10 aarch64
• Red Hat CodeReady Linux Builder for IBM z Systems 10 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