Bug 2569531 (CVE-2026-125073)

Summary: CVE-2026-125073 ffmpeg: ffmpeg: Denial of Service via infinite loop in IMC audio 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 trigger a Denial of Service (DoS) by convincing a user or system to decode a specially crafted audio file. Due to improper validation of bit allocation parameters in the IMC and IAC audio decoders, processing malformed input causes an infinite loop that consumes high CPU resources and hangs the application.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-11-10 13:00:51 UTC
FFmpeg through 9.0.2 contains an infinite loop vulnerability in bit_allocation() in libavcodec/imc.c that allows attackers to hang decoding by supplying audio blocks with a negative bit budget. Attackers can craft IMC or IAC audio files that drive freebits negative, causing the reduction loop to never terminate and consuming 100% CPU.