Alpine: postgresql16: security update to 16.14-r0

high Tenable Cloud Security Plugin ID 441889

Description

There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

- SQL injection in PostgreSQL logical replication ALTER SUBSCRIPTION ... REFRESH PUBLICATION allows a
subscriber table creator to execute arbitrary SQL with the subscription's publication-side credentials.
The attack takes effect at the next REFRESH PUBLICATION. Within major versions 16, 17, and 18, minor
versions before PostgreSQL 18.4, 17.10, and 16.14 are affected. Versions before PostgreSQL 16 are
unaffected. (CVE-2026-6638)

- Missing authorization in PostgreSQL CREATE TYPE allows an object creator to hijack other queries that use
search_path to find user-defined types, including extension-defined types. That is to say, the victim will
execute arbitrary SQL functions of the attacker's choice. Versions before PostgreSQL 18.4, 17.10, 16.14,
15.18, and 14.23 are affected. (CVE-2026-6472)

- Integer wraparound in multiple PostgreSQL server features allows an unprivileged database user to cause
the server to undersize an allocation and write out-of-bounds. This may execute arbitrary code as the
operating system user running the database. In applications that pass gigabyte-scale user inputs to the
relevant database functions, the application input provider may achieve a segmentation fault. Versions
before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected. (CVE-2026-6473)

- Externally-controlled format string in PostgreSQL timeofday() function allows an attacker to retrieve
portions of server memory, via crafted timezone zones. Versions before PostgreSQL 18.4, 17.10, 16.14,
15.18, and 14.23 are affected. (CVE-2026-6474)

- Symlink following in PostgreSQL pg_basebackup plain format and in pg_rewind allows an origin superuser to
overwrite local files, e.g. /var/lib/postgres/.bashrc, that hijack the operating system account. It will
remain the case that starting the server after these commands implicitly trusts the origin superuser, due
to features like shared_preload_libraries. Hence, the attack has practical implications only if one takes
relevant action between these commands and server start, like moving the files to a different VM or
snapshotting the VM. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.
(CVE-2026-6475)

Solution

Update the postgresql16 library and its related packages to version 16.14-r0 or later.

Plugin Details

Severity: High

ID: 441889

Version: Revision 1.5

Type: Local

Family: Alpine Linux Local Security Checks

Published: 5/15/2026

Updated: 5/20/2026

Supported Sensors: Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 6.9

Percentile: 96.92

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-2026-6638

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

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 5/14/2026

Reference Information

CVE: CVE-2026-6472, CVE-2026-6473, CVE-2026-6474, CVE-2026-6475, CVE-2026-6477, CVE-2026-6478, CVE-2026-6479, CVE-2026-6637, CVE-2026-6638

Detections

Analytics