Critical Security Flaw in libtiff: Arbitrary Code Execution Risk
Summary
RLSA-2026:19150: Important: libtiff security update. Affects libtiff versions < 0:4.6.0-8.el10_2.1. Fixed in 0:4.6.0-8.el10_2.1. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
libtiff is a widely used library for manipulating Tagged Image File Format (TIFF) files, enabling applications to read and write TIFF images efficiently. It is integral to various software applications that require image processing capabilities. However, a recent vulnerability has been identified that poses significant risks to systems utilizing this library.
Vulnerability Detail
The vulnerability, identified as CVE-2026-4775, arises from a signed integer overflow during TIFF file processing. This flaw can lead to arbitrary code execution or denial of service, allowing attackers to exploit the vulnerability by crafting malicious TIFF files. If successfully exploited, an attacker could execute arbitrary code on the affected system, potentially leading to unauthorized access and data breaches.
How To Fix
Minimum fixed version
0:4.6.0-8.el10_2.1
This is the first release that contains the fix.
sudo dnf update libtiffTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary measure, users can avoid processing untrusted TIFF files until the package is updated. This can help prevent potential exploitation of the vulnerability.
Conclusion
The libtiff library has a critical vulnerability (CVE-2026-4775) that can lead to severe security risks, including arbitrary code execution. It is crucial for users to update to the latest patched version to safeguard their systems. Utilizing tools like Vulert can help monitor and alert for such vulnerabilities in real-time.
See every vulnerability recorded for libtiff →
FAQ
CVE-2026-4775 is a vulnerability in the libtiff library that allows for arbitrary code execution or denial of service due to a signed integer overflow in TIFF file processing.
You can use Vulert, which monitors open-source vulnerabilities in your software. By uploading your manifest file like package-lock.json to Vulert, you can check for vulnerabilities without needing to install any software.
The vulnerability can lead to arbitrary code execution, allowing attackers to gain unauthorized access to systems, or cause denial of service, disrupting normal operations.
Yes, a patch is available. Users should update their libtiff package to version 0:4.6.0-8.el10_2.1 or later to address the vulnerability.
If immediate updates are not possible, refrain from processing untrusted TIFF files as a temporary workaround to mitigate the risk.
Related vulnerabilities
Recent vulnerabilities recorded for libtiff.
