Bug 2570015 (CVE-2026-125064)

Summary: CVE-2026-125064 ffmpeg: ffmpeg: Denial of Service via NULL pointer dereference in G.726 decoder
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: bbrownin
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in FFmpeg. An attacker could exploit this vulnerability to cause a Denial of Service (DoS) by enticing a user or automated service to process a specially crafted media file containing oversized G.726 audio data. Because the decoder fails to properly handle an initialization error when processing the malformed packet, a NULL pointer dereference occurs and crashes the application.
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Description OSIDB Bzimport 2026-11-10 19:31:03 UTC
FFmpeg through 9.0.2 contains a NULL pointer dereference vulnerability in g726_decode_frame() in libavcodec/g726.c because it ignores init_get_bits() failure on oversized packets. Attackers can supply a crafted AVI file with a 268435392-byte G.726 audio chunk to make the decoder read from a NULL buffer, crashing the process.