CVE-2026-50142
Description
A flaw was found in libheif, a HEIF and AVIF file format decoder and encoder. A remote attacker can provide a specially crafted HEIF sequence that triggers an unbounded heap allocation. This occurs because the HEIF sequence parser's fixed-size mode is missing a bound check, and an integer wraparound can bypass consistency checks. Successful exploitation can lead to excessive memory consumption, causing the application to crash or become unresponsive, resulting in a Denial of Service (DoS).
Statement
Red Hat Product Security has determined that this vulnerability does not affect any currently supported Red Hat product. This assessment may evolve based on further analysis and discovery. For more information about this vulnerability and the products it affects, please see the linked references.
Mitigation
To mitigate this issue, users should avoid processing untrusted HEIF or AVIF files with applications that utilize `libheif`. Additionally, consider sandboxing applications that handle HEIF/AVIF content to limit their resource consumption and potential impact on the system.
Understanding the Weakness (CWE)
Availability
Technical Impact: DoS: Resource Consumption (CPU); DoS: Resource Consumption (Memory); DoS: Resource Consumption (Other)
When allocating resources without limits, an attacker could prevent other systems, applications, or processes from accessing the same type of resource. It can be easy for an attacker to consume many resources by rapidly making many requests or causing larger resources to be used than is needed.
Frequently Asked Questions
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