CVE-2023-3618 Segmentation fault in fax3encode in libtiff/tif_fax3.c

What is CVE-2023-3618?

CVE-2023-3618 is a medium-severity memory corruption vulnerability in Debian Debian Linux, published on 12 Jul 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

A flaw was found in libtiff. A specially crafted tiff file can lead to a segmentation fault due to a buffer overflow in the Fax3Encode function in libtiff/tif_fax3.c, resulting in a denial of service.

Weakness: CWE-120

Which versions are affected by CVE-2023-3618?

It affects 3 products.

Products include Debian Debian Linux, Libtiff Libtiff, Redhat Enterprise Linux.

How do I fix CVE-2023-3618?

Apply the vendor's patch.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2023-3618 being exploited?

There is no known exploitation of CVE-2023-3618 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-27678, AZL-43489, AZL-43888, AZL-44391, AZL-45195, BELL-CVE-2023-3618 and 5 more.