Detections
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Amazon Linux 2023 : libtiff, libtiff-devel, libtiff-static (ALAS2023-2026-1983)

high Nessus Plugin ID 328492

Synopsis

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

Description

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1983 advisory.

 A flaw was found in libtiff. A remote attacker could exploit this vulnerability by providing a specially crafted PixarLog-compressed TIFF image. This issue occurs when decoding Pixarlog codec images with the PIXARLOGDATAFMT_8BITABGR output format and a specific stride value, leading to a heap-based buffer overflow. This could potentially result in arbitrary code execution or a denial of service (DoS).
 (CVE-2026-12912)

 Denial of Service via large SamplesPerPixel tag (CVE-2026-36849)

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 libtiff --releasever 2023.12.20260720' or or 'dnf update --advisory ALAS2023-2026-1983 --releasever 2023.12.20260720' to update your system.

See Also

https://alas.aws.amazon.com//AL2023/ALAS2023-2026-1983.html

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

https://explore.alas.aws.amazon.com/CVE-2026-12912.html

https://explore.alas.aws.amazon.com/CVE-2026-36849.html

Plugin Details

Severity: High

ID: 328492

File Name: al2023_ALAS2023-2026-1983.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 7/20/2026

Updated: 7/20/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 94.02

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2026-12912

CVSS v3

Risk Factor: High

Base Score: 7.3

Temporal Score: 6.4

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

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

Vulnerability Information

CPE: cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:libtiff-debuginfo, p-cpe:/a:amazon:linux:libtiff-debugsource, p-cpe:/a:amazon:linux:libtiff-devel, p-cpe:/a:amazon:linux:libtiff-static, p-cpe:/a:amazon:linux:libtiff-tools-debuginfo, p-cpe:/a:amazon:linux:libtiff-tools, p-cpe:/a:amazon:linux:libtiff

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

Exploit Ease: No known exploits are available

Patch Publication Date: 7/20/2026

Vulnerability Publication Date: 6/29/2026

Reference Information

CVE: CVE-2026-12912, CVE-2026-36849

IAVA: 2026-A-0670