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… (CVE-2026-64835)
FFmpeg versions 4.4 through 8.1.2 contain an out-of-bounds memory access vulnerability in the ADX audio decoder. This flaw occurs when a crafted ADX or AAX audio file with a mid-stream channel layout change is processed, leading to out-of-bounds reads and writes due to stale internal channel state during decoding.
AI Analysis
Technical Summary
The vulnerability exists in the ADX audio decoder within libavcodec/adxdec.c of FFmpeg versions 4.4 through 8.1.2. When AV_PKT_DATA_NEW_EXTRADATA side data is received mid-stream, the adx_decode_frame function re-parses the stream header but does not update the internal channel state. This causes subsequent decoding operations to access the prev[] state array using an outdated channel count, resulting in out-of-bounds memory reads and writes. This is classified as CWE-787 (Out-of-bounds Write).
Potential Impact
An attacker can trigger out-of-bounds memory reads and writes by supplying a specially crafted ADX or AAX audio file with a mid-stream channel layout change. This can lead to potential memory corruption, crashes, or other undefined behavior during audio decoding. The vulnerability is exploitable without privileges and requires user interaction (opening a crafted audio file).
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the available data. Until a patch is available, avoid processing untrusted ADX or AAX audio files that may contain mid-stream channel layout changes.
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… (CVE-2026-64835)
Description
FFmpeg versions 4.4 through 8.1.2 contain an out-of-bounds memory access vulnerability in the ADX audio decoder. This flaw occurs when a crafted ADX or AAX audio file with a mid-stream channel layout change is processed, leading to out-of-bounds reads and writes due to stale internal channel state during decoding.
CVSS v4.0
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability exists in the ADX audio decoder within libavcodec/adxdec.c of FFmpeg versions 4.4 through 8.1.2. When AV_PKT_DATA_NEW_EXTRADATA side data is received mid-stream, the adx_decode_frame function re-parses the stream header but does not update the internal channel state. This causes subsequent decoding operations to access the prev[] state array using an outdated channel count, resulting in out-of-bounds memory reads and writes. This is classified as CWE-787 (Out-of-bounds Write).
Potential Impact
An attacker can trigger out-of-bounds memory reads and writes by supplying a specially crafted ADX or AAX audio file with a mid-stream channel layout change. This can lead to potential memory corruption, crashes, or other undefined behavior during audio decoding. The vulnerability is exploitable without privileges and requires user interaction (opening a crafted audio file).
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the available data. Until a patch is available, avoid processing untrusted ADX or AAX audio files that may contain mid-stream channel layout changes.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-p2v8-4c4f-rwpq
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-64835"]
- Ecosystems
- []
- Database Specific Severity
- HIGH
- Cvss Version
- 4.0
Threat ID: 6a6151239c2644c7f8da6246
Added to database: 07/22/2026, 23:24:19 UTC
Last enriched: 07/22/2026, 23:57:11 UTC
Last updated: 07/23/2026, 00:32:10 UTC
Views: 2
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