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Amazon Linux 2023 : postgresql15, postgresql15-contrib, postgresql15-llvmjit (ALAS2023-2026-1456)

high Nessus Plugin ID 301360

Synopsis

The remote Amazon Linux 2023 host is missing a security update.

Description

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1456 advisory.

 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)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Run 'dnf update postgresql15 --releasever 2023.10.20260302' or or 'dnf update --advisory ALAS2023-2026-1456 --releasever 2023.10.20260302' to update your system.

See Also

https://alas.aws.amazon.com/faqs.html

https://explore.alas.aws.amazon.com/CVE-2026-2003.html

https://explore.alas.aws.amazon.com/CVE-2026-2004.html

https://explore.alas.aws.amazon.com/CVE-2026-2005.html

https://explore.alas.aws.amazon.com/CVE-2026-2006.html

https://alas.aws.amazon.com//AL2023/ALAS2023-2026-1456.html

Plugin Details

Severity: High

ID: 301360

File Name: al2023_ALAS2023-2026-1456.nasl

Version: 1.1

Type: local

Agent: unix

Published: 3/6/2026

Updated: 3/6/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: High

Base Score: 9

Temporal Score: 6.7

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C

CVSS Score Source: CVE-2026-2006

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:postgresql15-test-debuginfo, p-cpe:/a:amazon:linux:postgresql15-test-rpm-macros, p-cpe:/a:amazon:linux:postgresql15-upgrade-debuginfo, p-cpe:/a:amazon:linux:postgresql15-plperl-debuginfo, p-cpe:/a:amazon:linux:postgresql15-server-devel-debuginfo, p-cpe:/a:amazon:linux:postgresql15-docs-debuginfo, p-cpe:/a:amazon:linux:postgresql15-upgrade-devel-debuginfo, p-cpe:/a:amazon:linux:postgresql15-docs, p-cpe:/a:amazon:linux:postgresql15-server-debuginfo, p-cpe:/a:amazon:linux:postgresql15-test, p-cpe:/a:amazon:linux:postgresql15-server-devel, p-cpe:/a:amazon:linux:postgresql15-llvmjit, p-cpe:/a:amazon:linux:postgresql15-contrib-debuginfo, p-cpe:/a:amazon:linux:postgresql15-plperl, p-cpe:/a:amazon:linux:postgresql15-pltcl, p-cpe:/a:amazon:linux:postgresql15-pltcl-debuginfo, p-cpe:/a:amazon:linux:postgresql15-llvmjit-debuginfo, p-cpe:/a:amazon:linux:postgresql15-debugsource, p-cpe:/a:amazon:linux:postgresql15-debuginfo, p-cpe:/a:amazon:linux:postgresql15-upgrade, p-cpe:/a:amazon:linux:postgresql15-plpython3-debuginfo, p-cpe:/a:amazon:linux:postgresql15-static, p-cpe:/a:amazon:linux:postgresql15, p-cpe:/a:amazon:linux:postgresql15-plpython3, cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:postgresql15-private-libs-debuginfo, p-cpe:/a:amazon:linux:postgresql15-server, p-cpe:/a:amazon:linux:postgresql15-upgrade-devel, p-cpe:/a:amazon:linux:postgresql15-contrib, p-cpe:/a:amazon:linux:postgresql15-private-devel, p-cpe:/a:amazon:linux:postgresql15-private-libs

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 3/5/2026

Vulnerability Publication Date: 2/12/2026

Reference Information

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

IAVB: 2026-B-0047