Memory disclosure via unchecked DTS core size
Published Jul 22, 2026 · Updated Jul 22, 2026
Out-of-bounds read in FFmpeg 0.7.1 through 8.1.2 allows remote attackers to read past a packet buffer via a crafted DTS-HD stream. The spdif_header_dts4 function trusts a DTS core_size value without verifying that the declared core fits inside the actual packet. A user or automated service must process the attacker-controlled stream during S/PDIF re-muxing, which reads memory outside the packet boundary.
Summary
What happened
Out-of-bounds read in FFmpeg 0.7.1 through 8.1.2 allows remote attackers to read past a packet buffer via a crafted DTS-HD stream. The spdif_header_dts4 function trusts a DTS core_size value without verifying that the declared core fits inside the actual packet. A user or automated service must process the attacker-controlled stream during S/PDIF re-muxing, which reads memory outside the packet boundary.
The record
- CVE
- CVE-2026-64833
- Published
- Jul 22, 2026
- Updated
- Jul 22, 2026
- Vendor
- FFmpeg
- Product
- FFmpeg
- Classifications
- CWE-125, T1204.002
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 22, 2026CVE publishedPublication date reported by the CVE source.
- Jul 22, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0.7.1 <=8.1.2
- Affected versionversion=6f80e2765492700622596af720534cef33dd31b4
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo