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CVE-2026-56711

Description

A flaw was found in VLC media player. An integer overflow vulnerability exists when computing the size of a picture buffer, specifically in the AllocatePicture function. A remote attacker could exploit this by providing a specially crafted Portable Network Graphics (PNG) image file with large width and height dimensions. This leads to an undersized memory allocation, allowing the decoder to write past the end of the allocated buffer. This heap out-of-bounds write can result in arbitrary code execution.

Statement

Red Hat does not ship VLC media player in any Red Hat product. VLC is available in Fedora and EPEL community repositories and is affected in versions 3.0.0 through 3.0.23.

Mitigation

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

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