Copyright © 2012 Red Hat, Inc. All rights reserved. Important 2026-07-24T19:46:25 ffmpeg: FFmpeg: Arbitrary code execution via crafted PNG image 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CWE-787

FFmpeg through 8.1.2, fixed in commit b506faf, contains a heap out-of-bounds write vulnerability in the native PNG and APNG encoders that allows remote attackers to corrupt heap memory by supplying a crafted PNG image with a malicious eXIf chunk. Attackers can craft an eXIf chunk where multiple IFD entries reference the same large value payload, causing canonical serialization to expand the output far beyond the undersized allocation estimated by add_exif_profile_size(), resulting in png_write_chunk() writing tens of thousands of bytes past the buffer boundary, leading to deterministic heap corruption, process crash, and potentially arbitrary code execution.

A flaw was found in FFmpeg's native PNG and APNG encoders. A remote attacker can exploit this heap out-of-bounds write vulnerability by providing a specially crafted PNG image containing a malicious eXIf chunk. This can lead to heap memory corruption, a process crash, and potentially allow the attacker to execute arbitrary code on the affected system.

Red Hat Enterprise Linux AI (RHEL AI) 3 Affected ffmpeg Red Hat Enterprise Linux AI (RHEL AI) 3 Affected rhelai3/bootc-aws-cuda-rhel9 Red Hat Enterprise Linux AI (RHEL AI) 3 Affected rhelai3/bootc-azure-cuda-rhel9 Red Hat Enterprise Linux AI (RHEL AI) 3 Affected rhelai3/bootc-azure-rocm-rhel9 Red Hat Enterprise Linux AI (RHEL AI) 3 Affected rhelai3/bootc-cuda-rhel9 Red Hat Enterprise Linux AI (RHEL AI) 3 Affected rhelai3/bootc-gcp-cuda-rhel9 Red Hat Enterprise Linux AI (RHEL AI) 3 Affected rhelai3/bootc-rocm-rhel9 Red Hat OpenShift AI (RHOAI) Affected rhoai/odh-vllm-gaudi-rhel9 https://www.cve.org/CVERecord?id=CVE-2026-66040 https://nvd.nist.gov/vuln/detail/CVE-2026-66040 https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/b506fafec9a19fcbc2be5271875fd4a63d6615bc https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23786 https://www.vulncheck.com/advisories/ffmpeg-heap-out-of-bounds-write-via-png-apng-exif-encoder