Critical Security Flaw in libtiff: Arbitrary Code Execution and Denial of Service
Summary
ALSA-2026:19150: Important: libtiff security update. Affects libtiff versions < 4.6.0-8.el10_2.1. Fixed in 4.6.0-8.el10_2.1. How to fix ↓
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Background
libtiff is a widely used library for manipulating Tagged Image File Format (TIFF) files, providing essential functions for image processing. It is integral to various applications that require image handling capabilities. However, recent vulnerabilities have raised concerns about its security, particularly in how it processes TIFF files, making it susceptible to attacks that can lead to severe consequences.
Vulnerability Detail
The vulnerability identified as CVE-2026-4775 is a critical issue stemming from a signed integer overflow in the processing of TIFF files. This flaw can be exploited to execute arbitrary code or cause a denial of service, potentially compromising the integrity and availability of systems utilizing the libtiff library. Attackers can craft malicious TIFF files that, when processed, trigger this overflow, leading to unpredictable behavior and security breaches.
How To Fix
Minimum fixed version
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 mitigate the risk of exploitation while waiting for a permanent fix.
Conclusion
The libtiff library has a critical vulnerability that can lead to arbitrary code execution or denial of service. It is crucial for users to update their packages to the latest version to protect their systems. Utilizing tools like Vulert can help monitor and manage vulnerabilities effectively.
See every vulnerability recorded for libtiff →
FAQ
CVE-2026-4775 is a security vulnerability in the libtiff library that allows for arbitrary code execution or denial of service due to a signed integer overflow during TIFF file processing.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. By checking your manifest file like package-lock.json, you can determine if your application is affected by this vulnerability.
If an immediate update is not possible, refrain from processing untrusted TIFF files to reduce the risk of exploitation until the update can be applied.
For detailed information about CVE-2026-4775, including its impact and mitigation strategies, refer to the CVE page linked in the advisory.
Yes, you can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without requiring any signup.
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Recent vulnerabilities recorded for libtiff.
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