FFmpeg 4.4 - 8.1.2 Out-of-Bounds Memory Access in ADX Audio Decoder 漏洞概述 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. 影响范围 FFmpeg >= 4.4, <= 8.1.2 修复方案 Pull Request Patch Commit 参考链接 CVE-2026-64835 CWE-787 Out-of-bounds Write CVSS 8.7 CVSS V4 Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/R:V/C:H/I:H/A:H/SC:N/SI:N/SA:N 贡献者 Pavel Kohout, Aisle Research