CVE-2025-9951VulnerabilityPublished 8 Sep 2025Updated 2 Jun 2026

Debian ffmpeg · ffmpeg: Schwachstelle ermöglicht Codeausführung und potenziell Denial of Service

Affects Debian ffmpegSource GCVE Database

Not known to be exploited : upgrade the Debian debian/ffmpeg package to 8.0 soon.

Data as of 26 Oct 2026, 10:12 UTC

Severity

High

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS: 0.4% chance of exploitation in 30 days – higher than 38% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 8.0

Exploitation evidence

Disclosed: evidence found.
CVE published 8 Sep 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

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What to do

Upgrade the Debian debian/ffmpeg package to 8.0.

Affected software

Product	Affected	Fixed in
Debiandebian/ffmpeg`pkg:deb/debian/ffmpeg`Other threats	Affected <8.0	Fixed in 8.0

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AI-suggested

Official fixes for this vulnerability are available through Ubuntu Pro Extended Security Maintenance (ESM) for supported Ubuntu LTS releases (18.04, 20.04, 22.04, 24.04). Users should update their FFmpeg packages to the patched versions provided by Ubuntu Pro. For other distributions or environments, users should monitor vendor advisories for corresponding patches. Applying these updates will mitigate the risk of exploitation. No additional mitigation steps are indicated by the vendor advisory.

Description

A vulnerability identified as CVE-2025-9951 affects FFmpeg versions prior to 8.0, specifically in the JPEG 2000 decoder where improper memory handling can lead to a heap buffer overflow. This flaw could allow an attacker to cause a denial of service or potentially leak sensitive information by tricking a user or application into opening a specially crafted media file. The issue is part of a broader set of FFmpeg vulnerabilities addressed in recent security advisories. Official patches are available through Ubuntu Pro via Extended Security Maintenance (ESM) for multiple Ubuntu LTS releases. Users are advised to update their FFmpeg packages accordingly to mitigate this risk.

Impact

The vulnerability allows remote attackers to cause a denial of service or potentially leak sensitive information by exploiting a heap buffer overflow in the JPEG 2000 decoder of FFmpeg. This could disrupt multimedia processing applications relying on FFmpeg or expose data if a crafted file is processed. There is no confirmed exploitation in the wild. The impact is limited to systems using vulnerable FFmpeg versions and processing untrusted media files.

Summary

CVE-2025-9951 is a heap buffer overflow vulnerability in FFmpeg's JPEG 2000 decoder caused by incorrect memory handling. This vulnerability can be triggered by processing a crafted media file, potentially leading to denial of service or information leakage. It affects FFmpeg versions prior to 8.0 and is included among several security issues fixed in recent Ubuntu security notices. The vendor advisory from Ubuntu indicates that fixes are available via Ubuntu Pro ESM packages for supported LTS versions. No direct evidence of exploitation in the wild has been reported. The vulnerability is part of a set of FFmpeg issues involving memory mismanagement and input validation flaws.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 3 Jun 2026, 21:24 UTC

Technical details

References

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