Bug 2570153 (CVE-2026-125240)

Summary: CVE-2026-125240 ffmpeg: ffmpeg: Denial of Service via resource leak in JPEG XS 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. When decoding a crafted JPEG XS stream with invalid frame dimensions, the JPEG XS decoder fails to properly release allocated decoder instances. An attacker could exploit this flaw by tricking a user or system into processing a malicious media file, repeatedly leaking memory buffers and threads. This can cause memory exhaustion, leading to an application crash and a Denial of Service (DoS).
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-11-10 19:39:44 UTC
FFmpeg through 9.0.2 contains a resource leak vulnerability in svt_jpegxs_dec_decode() in libsvtjpegxsdec.c that leaks decoder instances when ff_set_dimensions() rejects frame dimensions. Attackers can supply a crafted JPEG XS stream, for example in MPEG-TS, with oversized headers to repeatedly leak decoder threads and buffers, exhausting memory.