GHSA-423p-f8g4-wmpc

GHSA-423p-f8g4-wmpc PUBLISHED CVSS 6.5 MEDIUM

Record from GitHub Advisory Database · Published May 13, 2022

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.

Risk scores

CVSS 3.0

6.5

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Timeline

May 13, 2022 CVE Published
Apr 9, 2026 Security Advisory
Apr 30, 2026 Distribution Patch

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The same record, from the CLI:

vulnetix vdb vuln GHSA-423p-f8g4-wmpc
vulnetix vdb fixes GHSA-423p-f8g4-wmpc

Or with curl, using the org id and key from your account page:

curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
  "https://api.vdb.vulnetix.com/v2/vuln/GHSA-423p-f8g4-wmpc/fixes/registry"

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References

https://github.com/FFmpeg/FFmpeg/commit/23ccf3cabb4baf6e8af4b1af3fcc59c904736f21 url
https://seclists.org/bugtraq/2019/May/60 url
https://www.debian.org/security/2019/dsa-4449 url
https://nvd.nist.gov/vuln/detail/CVE-2019-9718 advisory
https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/1f00c97bc3475c477f3c468cf2d924d5761d0982 url
https://usn.ubuntu.com/3967-1 url
http://www.securityfocus.com/bid/107382 url

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