ALAS2POSTGRESQL14-2026-022

Amazon Linux 2 Security Advisory: ALAS2POSTGRESQL14-2026-022
Advisory Released Date: 2026-03-06
Advisory Updated Date: 2026-03-06
Severity: Important
Issue Overview:

Improper validation of type "oidvector" in PostgreSQL allows a database user to disclose a few bytes of server memory. We have not ruled out viability of attacks that arrange for presence of confidential information in disclosed bytes, but they seem unlikely. Versions before PostgreSQL 18.2, 17.8, 16.12, 15.16, and 14.21 are affected. (CVE-2026-2003)

Missing validation of type of input in PostgreSQL intarray extension selectivity estimator function allows an object creator to execute arbitrary code as the operating system user running the database. Versions before PostgreSQL 18.2, 17.8, 16.12, 15.16, and 14.21 are affected. (CVE-2026-2004)

Heap buffer overflow in PostgreSQL pgcrypto allows a ciphertext provider to execute arbitrary code as the operating system user running the database. Versions before PostgreSQL 18.2, 17.8, 16.12, 15.16, and 14.21 are affected. (CVE-2026-2005)

Missing validation of multibyte character length in PostgreSQL text manipulation allows a database user to issue crafted queries that achieve a buffer overrun. That suffices to execute arbitrary code as the operating system user running the database. Versions before PostgreSQL 18.2, 17.8, 16.12, 15.16, and 14.21 are affected. (CVE-2026-2006)


Affected Packages:

postgresql


Note:

This advisory is applicable to Amazon Linux 2 - Postgresql14 Extra. Visit this page to learn more about Amazon Linux 2 (AL2) Extras and this FAQ section for the difference between AL2 Core and AL2 Extras advisories.


Issue Correction:
Run yum update postgresql or yum update --advisory ALAS2POSTGRESQL14-2026-022 to update your system.

New Packages:
aarch64:
    postgresql-14.21-1.amzn2.0.1.aarch64
    postgresql-server-14.21-1.amzn2.0.1.aarch64
    postgresql-docs-14.21-1.amzn2.0.1.aarch64
    postgresql-contrib-14.21-1.amzn2.0.1.aarch64
    postgresql-server-devel-14.21-1.amzn2.0.1.aarch64
    postgresql-static-14.21-1.amzn2.0.1.aarch64
    postgresql-upgrade-14.21-1.amzn2.0.1.aarch64
    postgresql-upgrade-devel-14.21-1.amzn2.0.1.aarch64
    postgresql-plperl-14.21-1.amzn2.0.1.aarch64
    postgresql-plpython3-14.21-1.amzn2.0.1.aarch64
    postgresql-pltcl-14.21-1.amzn2.0.1.aarch64
    postgresql-test-14.21-1.amzn2.0.1.aarch64
    postgresql-llvmjit-14.21-1.amzn2.0.1.aarch64
    postgresql-debuginfo-14.21-1.amzn2.0.1.aarch64

noarch:
    postgresql-test-rpm-macros-14.21-1.amzn2.0.1.noarch

src:
    postgresql-14.21-1.amzn2.0.1.src

x86_64:
    postgresql-14.21-1.amzn2.0.1.x86_64
    postgresql-server-14.21-1.amzn2.0.1.x86_64
    postgresql-docs-14.21-1.amzn2.0.1.x86_64
    postgresql-contrib-14.21-1.amzn2.0.1.x86_64
    postgresql-server-devel-14.21-1.amzn2.0.1.x86_64
    postgresql-static-14.21-1.amzn2.0.1.x86_64
    postgresql-upgrade-14.21-1.amzn2.0.1.x86_64
    postgresql-upgrade-devel-14.21-1.amzn2.0.1.x86_64
    postgresql-plperl-14.21-1.amzn2.0.1.x86_64
    postgresql-plpython3-14.21-1.amzn2.0.1.x86_64
    postgresql-pltcl-14.21-1.amzn2.0.1.x86_64
    postgresql-test-14.21-1.amzn2.0.1.x86_64
    postgresql-llvmjit-14.21-1.amzn2.0.1.x86_64
    postgresql-debuginfo-14.21-1.amzn2.0.1.x86_64

Additional References

Release Notes:  Amazon Linux 2 Release Notes

Red Hat: CVE-2026-2003, CVE-2026-2004, CVE-2026-2005, CVE-2026-2006

Mitre: CVE-2026-2003, CVE-2026-2004, CVE-2026-2005, CVE-2026-2006