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CVE-2026-125245 ffmpeg ffmpeg

5.7 mediumEPSS 0.2%

Medium (5.7) in ffmpeg ffmpeg. EPSS 0.2% estimated probability of exploitation activity in the next 30 days.

On this page
FFmpeg through 9.0.2 contains a memory leak vulnerability in ff_mjpeg_decode_sof() in libavcodec/mjpegdec.c, which overwrites the hwaccel_picture_private pointer without freeing it. Attackers can supply crafted MJPEG streams with repeated SOF markers or failing frames to leak hwaccel private data and hardware buffers under VAAPI or NVDEC decoding.

Severity

CVSS 4.0

5.7 medium
CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

4.7 medium
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
EPSS
0.2% estimated probability of exploitation activity in the next 30 days; 5th percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
CISA's assessment (SSVC)
Exploitation: none · Automatable: no · Technical impact: partial, assessed 2026-11-09. From CISA's Vulnrichment in the CVE List: whether it is exploited, whether exploiting it can be automated, and how much control it gives.
CWE
CWE-401 Missing Release of Memory after Effective Lifetime
Published
Modified
Assigned by
VulnCheck (CNA)
NVD analysis
Awaiting analysis
Record from
the NVD, synced

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Affected

Versions

From the CNA's record in the CVE List.

ProductAffected
FFmpegthrough 9.0.2

Linux distributions

DistributionReleasePackageFixed inAdvisory
Ubuntu26.10, Pro:16.04:LTS, Pro:18.04:LTS and 4 moreffmpegno fix listedUBUNTU-CVE-2026-125245

From the distributions' data via OSV.dev: Ubuntu Security Notices © Canonical Ltd., CC BY-SA 4.0. Modified: reformatted and linked to CVE records. Credits. On the distributions' own pages: Ubuntu.

References

Check your stackJSON