PT-2026-63444 · FFmpeg · Ffmpeg

CVE-2026-64835 · Published 2026-07-22 · Updated 2026-07-22

NVD

CVSS v3.1

8.8

High

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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.

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2026-64835

Affected Products

Ffmpeg

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-64835 · Security Note
• https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/1836ef96846937a6cc2443698a693104f5c0b21e · Patch
• https://vulncheck.com/advisories/ffmpeg-out-of-bounds-memory-access-in-adx-audio-decoder · Note
• https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23659 · Note