Bug 2569879 (CVE-2026-125265)

Summary: CVE-2026-125265 ffmpeg: ffmpeg: Denial of Service via use-after-free in NVDEC
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. This vulnerability allows an attacker to cause an application crash leading to a Denial of Service (DoS) or potentially expose sensitive memory contents by tricking a user or system into processing a specially crafted video file. The issue occurs because the NVDEC (NVIDIA Video Decoder) hardware acceleration component fails to reset its internal stream state after slice decoding errors, leading to a use-after-free condition where freed memory is accessed.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-11-10 19:21:30 UTC
FFmpeg through 9.0.2 contains a use-after-free vulnerability in libavcodec/nvdec.c because ff_nvdec_start_frame() fails to reset ctx->bitstream after slice errors. Attackers can supply crafted video that abandons a picture before end_frame, causing cuvidDecodePicture() to read freed heap memory, crashing applications or exposing stale heap contents.