CVE-2026-64832Network attack vector

Memory corruption via NVDEC decoder double-free

Published Jul 22, 2026 · Updated Jul 22, 2026

Double-free in FFmpeg 4.4 through 8.1.2 allows context-dependent attackers to corrupt memory via a crafted video decoded with NVIDIA NVDEC. When no decoder surfaces remain, ff_nvdec_start_frame_sep_ref calls nvdec_fdd_priv_free on frame decode data that the caller later frees again. Reachability requires an NVIDIA GPU, an NVDEC-enabled build, hardware-accelerated decoding, and user interaction with attacker-controlled media.

CVSS severity8.7
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Double-free in FFmpeg 4.4 through 8.1.2 allows context-dependent attackers to corrupt memory via a crafted video decoded with NVIDIA NVDEC. When no decoder surfaces remain, ff_nvdec_start_frame_sep_ref calls nvdec_fdd_priv_free on frame decode data that the caller later frees again. Reachability requires an NVIDIA GPU, an NVDEC-enabled build, hardware-accelerated decoding, and user interaction with attacker-controlled media.

The record

CVE
CVE-2026-64832
Published
Jul 22, 2026
Updated
Jul 22, 2026
Vendor
FFmpeg
Product
FFmpeg
Classifications
CWE-415, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 22, 2026CVE publishedPublication date reported by the CVE source.
  2. 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.

  1. Affected versionversion=4.4 <=8.1.2
  2. Affected versionversion=4c6217477fc64305055b37d9d1d0d76d30e37f97

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

FFmpeg · FFmpegversion=4.4 <=8.1.2; version=4c6217477fc64305055b37d9d1d0d76d30e37f97

Published CVSS scores

8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-415Double Free
T1204.002User Execution: Malicious File

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