Bug 2510588

Summary: CVE-2026-66041 ffmpeg: FFmpeg: Arbitrary code execution via crafted PGS/SUP subtitle file [fedora-43]
Product: [Fedora] Fedora Reporter: Marian Rehak <mrehak>
Component: ffmpegAssignee: Multimedia SIG <multimedia-sig>
Status: ASSIGNED --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: 43CC: asn, development.group, dominik, multimedia-sig, ngompa13
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["f597601a-6156-4e62-a310-7f2773ca2287"]}
Fixed In Version: ffmpeg-9.0.1-1.fc46,ffmpeg-9.0.1-4.fc45,ffmpeg-8.1.3-1.fc44 Doc Type: ---
Doc Text:
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Documentation: --- CRM:
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On:    
Bug Blocks: 2506935    

Description Marian Rehak 2026-08-03 10:08:48 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

FFmpeg 7.0 through 8.1.2, fixed in commit 4da9812, contains a heap out-of-bounds write vulnerability in the vf_quirc filter that allows an attacker to corrupt heap memory by supplying a crafted PGS/SUP subtitle file with mismatched frame dimensions. Attackers can provide a subtitle file whose second presentation has larger dimensions than its first, causing av_image_copy_plane() to copy data exceeding the initial allocation size into the undersized libquirc grayscale image buffer, resulting in heap corruption and process crash with potential for code execution.
Comment 1 Aoife Moloney 2026-08-17 15:45:32 UTC 
This bug appears to have been reported against 'rawhide' during the Fedora Linux 45 development cycle.
Changing version to 45.
Comment 2 Dominik 'Rathann' Mierzejewski 2026-09-28 11:48:22 UTC 
Fixed in:
9.0:   https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/c20d78c6838ae62e9954163833d24fc0ed1b74a3
8.1.3: https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/6757c200cdd0e80cabde7a19e1261a3ffd118c54

NOT fixed in 7.1.x
Comment 3 Fedora Update System 2026-09-28 11:48:44 UTC 
FEDORA-2026-3e109a0c85 (ffmpeg-8.1.3-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-3e109a0c85
Comment 4 Fedora Update System 2026-09-29 02:11:03 UTC 
FEDORA-2026-3e109a0c85 has been pushed to the Fedora 44 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-3e109a0c85`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-3e109a0c85

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
Comment 5 Fedora Update System 2026-10-01 01:12:00 UTC 
FEDORA-2026-3e109a0c85 (ffmpeg-8.1.3-1.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.