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CVE-2025-59731— Heap-buffer-overflow write in FFmpeg EXR dwa_uncompress

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.

OpenEXR是Academy Software Foundation开源的一种高动态范围图像（HDR）文件格式的开放标准。 OpenEXR 8.0之前版本存在安全漏洞，该漏洞源于未检查DWAA或DWAB压缩中指定的原始长度，可能导致越界写入。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-59731

Vulnerability Information
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Vulnerability Title
Heap-buffer-overflow write in FFmpeg EXR dwa_uncompress
Source: CVE Program / CVE List V5
Vulnerability Description
When decoding an OpenEXR file that uses DWAA or DWAB compression, the specified raw length of run-length-encoded data is not checked when using it to calculate the output data. We read rle_raw_size from the input file at [0], we decompress and decode into the buffer td->rle_raw_data of size rle_raw_size at [1], and then at [2] we will access entries in this buffer up to (td->xsize - 1) * (td->ysize - 1) + rle_raw_size / 2, which may exceed rle_raw_size. We recommend upgrading to version 8.0 or beyond.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:A/AC:H/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
OpenEXR 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenEXR是Academy Software Foundation开源的一种高动态范围图像（HDR）文件格式的开放标准。 OpenEXR 8.0之前版本存在安全漏洞，该漏洞源于未检查DWAA或DWAB压缩中指定的原始长度，可能导致越界写入。
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 9a32b863074ed4140141e0d3613905c6f1fe61c5 ~ 8.0 -

II. Public POCs for CVE-2025-59731

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III. Intelligence Information for CVE-2025-59731

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Same Patch Batch · FFmpeg · 2025-10-06 · 7 CVEs total

CVE-2025-59733 Heap-buffer-overflow write in FFmpeg EXR dwa_uncompress
CVE-2025-59734 Heap-buffer-overflow write in FFmpeg SANM process_ftch
CVE-2025-59728 Heap-buffer-overflow write in FFmpeg MDASH resolve_content_path
CVE-2025-59730 Heap-buffer-overflow write in FFmpeg SANM decoding due to lack of bounds-checking in old_c
CVE-2025-59732 Heap-buffer-overflow write in FFmpeg EXR dwa_uncompress
CVE-2025-59729 Heap-buffer-overflow read in FFmpeg DHAV get_duration

IV. Related Vulnerabilities

Same product: FFmpeg
Same vendor: FFmpeg
Same weakness: CWE-787

V. Comments for CVE-2025-59731

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