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CVE-2026-64832— FFmpeg 4.4 - 8.1.2 Double-Free in NVDEC Hardware Decoder via nvdec.c

Quick assessment

Affected
FFmpeg FFmpeg
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FFmpeg是FFmpeg组织开源的一套可录制、转换以及流化音视频的完整解决方案。 FFmpeg 4.4版本至8.1.2版本存在资源管理错误漏洞，该漏洞源于libavcodec/nvdec.c中的NVIDIA NVDEC硬件解码器存在双重释放，当解码器表面（decoder surfaces）用尽时，ff_nvdec_start_frame_sep_ref错误路径通过nvdec_fdd_priv_free释放内存，而调用层随后释放相同的帧描述数据，导致底层解码器环境被双重释放，可能允许攻击者通过提供特制视频

CVSS 8.8 · High EPSS 0.34% · P25

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
FFmpeg FFmpeg 4.4≤ 8.1.2 affected
4c6217477fc64305055b37d9d1d0d76d30e37f97 affected
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I. Basic Information for CVE-2026-64832

Vulnerability Information
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Vulnerability Title
FFmpeg 4.4 - 8.1.2 Double-Free in NVDEC Hardware Decoder via nvdec.c
Source: CVE Program / CVE List V5
Vulnerability Description
FFmpeg versions 4.4 through 8.1.2 contain a double-free vulnerability in the NVIDIA NVDEC hardware decoder within libavcodec/nvdec.c that allows attackers to trigger memory corruption by supplying a crafted video file. When no decoder surfaces remain, the ff_nvdec_start_frame_sep_ref error path frees memory via nvdec_fdd_priv_free while the calling layer subsequently frees the same frame description data, resulting in a double-free of the underlying decoder context in any FFmpeg-based application using NVDEC hardware-accelerated decoding.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
双重释放
Source: CVE Program / CVE List V5
Vulnerability Title
FFmpeg 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FFmpeg是FFmpeg组织开源的一套可录制、转换以及流化音视频的完整解决方案。 FFmpeg 4.4版本至8.1.2版本存在资源管理错误漏洞，该漏洞源于libavcodec/nvdec.c中的NVIDIA NVDEC硬件解码器存在双重释放，当解码器表面（decoder surfaces）用尽时，ff_nvdec_start_frame_sep_ref错误路径通过nvdec_fdd_priv_free释放内存，而调用层随后释放相同的帧描述数据，导致底层解码器环境被双重释放，可能允许攻击者通过提供特制视频
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
FFmpeg FFmpeg 4.4 ~ 8.1.2 -

II. Public POCs for CVE-2026-64832

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III. Intelligence Information for CVE-2026-64832

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Patches & Fixes for CVE-2026-64832 (2)

Vendor Advisories for CVE-2026-64832 (1)

Same Patch Batch · FFmpeg · 2026-07-22 · 6 CVEs total

CVE-2026-64831 8.8 HIGH FFmpeg 8.0 - 8.1.2 Stack Buffer Overflow in Vulkan HEVC Decoder
CVE-2026-64830 8.8 HIGH FFmpeg 2.1 - 8.1.2 Heap Buffer Overflow via VobSub Subtitle Demuxer
CVE-2026-64835 8.8 HIGH FFmpeg 4.4 - 8.1.2 Out-of-Bounds Memory Access in ADX Audio Decoder
CVE-2026-64834 7.5 HIGH FFmpeg 0.6.3 - 8.1.2 Infinite Loop DoS via RTP/ASF Demuxer
CVE-2026-64833 7.1 HIGH FFmpeg 0.7.1 - 8.1.2 Out-of-Bounds Read via S/PDIF Muxer spdifenc.c

IV. Related Vulnerabilities

Same product: FFmpeg
Same vendor: FFmpeg
Same weakness: CWE-415

V. Comments for CVE-2026-64832

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