Bug 2506192 (CVE-2026-64833)

Summary: CVE-2026-64833 ffmpeg: FFmpeg: Information disclosure and denial of service via out-of-bounds read in S/PDIF muxer
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: bbrownin, gtanzill, jbuscemi
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in FFmpeg, specifically within the S/PDIF muxer. A remote attacker can exploit an out-of-bounds read vulnerability by providing a specially crafted DTS-HD audio stream during S/PDIF re-muxing. This allows the attacker to read memory beyond the intended buffer boundaries, potentially leading to information disclosure and denial of service.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-07-22 18:01:49 UTC 
FFmpeg versions 0.7.1 through 8.1.2 contain an out-of-bounds read vulnerability in the S/PDIF muxer that allows attackers to access memory beyond buffer boundaries by supplying a crafted DTS stream with a core_size value larger than the actual packet length. Attackers can exploit the missing bounds check in the spdif_header_dts4 function by providing a malicious DTS-HD audio stream during S/PDIF re-muxing to trigger unauthorized memory reads beyond the packet buffer.