CVE-2026-64835

FFmpeg versions 4.4 through 8.1.2 contain an out-of-bounds memory access vulnerability in the ADX audio decoder within libavcodec/adxdec.c that allows attackers to trigger both out-of-bounds reads and writes by supplying a crafted ADX or AAX audio file with a mid-stream channel layout change. When AV_PKT_DATA_NEW_EXTRADATA side data is received mid-stream, the adx_decode_frame function re-parses the stream header but fails to update the internal channel state, causing subsequent decoding operations to access the prev[] state array using a stale channel count.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/1836ef96846937a6cc2443698a693104f5c0b21e	Patch
https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23659	Issue Tracking Patch
https://www.vulncheck.com/advisories/ffmpeg-out-of-bounds-memory-access-in-adx-audio-decoder	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:*

History

28 Jul 2026, 17:02

Type	Values Removed	Values Added
First Time		Ffmpeg Ffmpeg ffmpeg
CPE		cpe:2.3:a:ffmpeg:ffmpeg::::::::
References	~~() https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/1836ef96846937a6cc2443698a693104f5c0b21e -~~	() https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/1836ef96846937a6cc2443698a693104f5c0b21e - Patch
References	~~() https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23659 -~~	() https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23659 - Issue Tracking, Patch
References	~~() https://www.vulncheck.com/advisories/ffmpeg-out-of-bounds-memory-access-in-adx-audio-decoder -~~	() https://www.vulncheck.com/advisories/ffmpeg-out-of-bounds-memory-access-in-adx-audio-decoder - Third Party Advisory

22 Jul 2026, 18:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-22 18:17

Updated : 2026-07-28 17:02

NVD link : CVE-2026-64835

Mitre link : CVE-2026-64835

CVE.ORG link : CVE-2026-64835

JSON object : View

Products Affected

ffmpeg

ffmpeg

CWE

CWE-787

Out-of-bounds Write

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