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… (CVE-2026-64833)
FFmpeg versions 0.7.1 through 8.1.2 contain an out-of-bounds read vulnerability in the S/PDIF muxer. This flaw arises from a missing bounds check in the spdif_header_dts4 function when processing crafted DTS-HD audio streams with a core_size value larger than the actual packet length. Exploitation allows attackers to read memory beyond the intended buffer during S/PDIF re-muxing.
AI Analysis
Technical Summary
An out-of-bounds read vulnerability exists in FFmpeg's S/PDIF muxer in versions 0.7.1 through 8.1.2. The vulnerability is due to the absence of proper bounds checking on the core_size field in DTS-HD audio streams during S/PDIF re-muxing. Attackers can supply a malicious DTS stream with an oversized core_size value, triggering unauthorized memory reads beyond the packet buffer in the spdif_header_dts4 function. This vulnerability is tracked as CVE-2026-64833 and is categorized under CWE-125 (Out-of-bounds Read).
Potential Impact
Successful exploitation allows an attacker to read memory beyond the buffer boundaries, potentially exposing sensitive information or causing application instability. The vulnerability does not require privileges or user interaction beyond supplying a crafted DTS-HD audio stream. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are currently available. Users should monitor FFmpeg vendor advisories for updates and avoid processing untrusted DTS-HD audio streams with vulnerable versions.
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… (CVE-2026-64833)
Description
FFmpeg versions 0.7.1 through 8.1.2 contain an out-of-bounds read vulnerability in the S/PDIF muxer. This flaw arises from a missing bounds check in the spdif_header_dts4 function when processing crafted DTS-HD audio streams with a core_size value larger than the actual packet length. Exploitation allows attackers to read memory beyond the intended buffer during S/PDIF re-muxing.
CVSS v4.0
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
An out-of-bounds read vulnerability exists in FFmpeg's S/PDIF muxer in versions 0.7.1 through 8.1.2. The vulnerability is due to the absence of proper bounds checking on the core_size field in DTS-HD audio streams during S/PDIF re-muxing. Attackers can supply a malicious DTS stream with an oversized core_size value, triggering unauthorized memory reads beyond the packet buffer in the spdif_header_dts4 function. This vulnerability is tracked as CVE-2026-64833 and is categorized under CWE-125 (Out-of-bounds Read).
Potential Impact
Successful exploitation allows an attacker to read memory beyond the buffer boundaries, potentially exposing sensitive information or causing application instability. The vulnerability does not require privileges or user interaction beyond supplying a crafted DTS-HD audio stream. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are currently available. Users should monitor FFmpeg vendor advisories for updates and avoid processing untrusted DTS-HD audio streams with vulnerable versions.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-34g6-m4cp-w5c9
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-64833"]
- Ecosystems
- []
- Database Specific Severity
- HIGH
- Cvss Version
- 4.0
Threat ID: 6a6151269c2644c7f8da62f5
Added to database: 07/22/2026, 23:24:22 UTC
Last enriched: 07/23/2026, 01:06:59 UTC
Last updated: 07/23/2026, 01:06:59 UTC
Views: 2
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