Bug 2506195 (CVE-2026-64835)

Summary: CVE-2026-64835 FFmpeg: FFmpeg: Arbitrary code execution, information disclosure, or denial of service via crafted ADX/AAX audio files
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: alinfoot, bbrownin, dtrifiro, rbryant, weaton
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in FFmpeg. A remote attacker could exploit an out-of-bounds memory access vulnerability in the ADX audio decoder by supplying a specially crafted ADX or AAX audio file. This could lead to the attacker triggering both out-of-bounds reads and writes, potentially resulting in arbitrary code execution, information disclosure, or denial of service.
 Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2507016, 2507017, 2507018, 2507019, 2507020    
Bug Blocks:    

Description OSIDB Bzimport 2026-07-22 18:02:06 UTC 
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.