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CVE-2019-9718
In FFmpeg 3.2 and 4.1, a denial of service in the subtitle decoder allows attackers to hog the CPU via a crafted video file in Matroska…
Medium6.5EPSS 1.6%
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
In FFmpeg 3.2 and 4.1, a denial of service in the subtitle decoder allows attackers to hog the CPU via a crafted video file in Matroska format, because ff_htmlmarkup_to_ass in libavcodec/htmlsubtitles.c has a complex format argument to sscanf.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 1.6% · top 25% of all CVEs (5 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.
Weakness
Affected products
n/a
- affected n/a
References (6)
- https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/1f00c97bc3475c477f3c468cf2d924d5761d0982 (opens in a new tab)x_refsource_MISCx_transferred
- 107382 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- USN-3967-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- 20190523 [SECURITY] [DSA 4449-1] ffmpeg security update (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- DSA-4449 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- https://github.com/FFmpeg/FFmpeg/commit/23ccf3cabb4baf6e8af4b1af3fcc59c904736f21 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2019-9718)Record last updated .