Bug 2458862 (CVE-2026-40962)

Summary: CVE-2026-40962 FFmpeg: FFmpeg: Integer overflow and out-of-bounds write via CENC subsample data
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, ebourniv, gtanzill, hasun, jbuscemi, jkoehler, lgallett, lphiri, nyancey, ptisnovs, sbunciak
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in FFmpeg. This vulnerability, stemming from an integer overflow and a subsequent out-of-bounds write during the processing of Common Encryption (CENC) subsample data, could allow a local attacker to potentially trigger information disclosure, data corruption, or a denial of service.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2458944, 2458945    
Bug Blocks:    

Description OSIDB Bzimport 2026-04-16 02:01:49 UTC
FFmpeg before 8.1 has an integer overflow and resultant out-of-bounds write via CENC (Common Encryption) subsample data to libavformat/mov.c.