Search for vulnerabilities
Vulnerability details: VCID-hjqc-qxmq-d7hb
Vulnerability ID VCID-hjqc-qxmq-d7hb
Aliases CVE-2019-9718
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 5.9
Risk 3.0
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-400 Uncontrolled Resource Consumption
CWE-125 Out-of-bounds Read
System Score Found at
cvssv3 4.3 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-9718.json
epss 0.01903 https://api.first.org/data/v1/epss?cve=CVE-2019-9718
epss 0.01903 https://api.first.org/data/v1/epss?cve=CVE-2019-9718
epss 0.01903 https://api.first.org/data/v1/epss?cve=CVE-2019-9718
epss 0.01903 https://api.first.org/data/v1/epss?cve=CVE-2019-9718
epss 0.01903 https://api.first.org/data/v1/epss?cve=CVE-2019-9718
epss 0.01903 https://api.first.org/data/v1/epss?cve=CVE-2019-9718
epss 0.01903 https://api.first.org/data/v1/epss?cve=CVE-2019-9718
epss 0.01903 https://api.first.org/data/v1/epss?cve=CVE-2019-9718
epss 0.01903 https://api.first.org/data/v1/epss?cve=CVE-2019-9718
epss 0.01903 https://api.first.org/data/v1/epss?cve=CVE-2019-9718
epss 0.01903 https://api.first.org/data/v1/epss?cve=CVE-2019-9718
epss 0.01903 https://api.first.org/data/v1/epss?cve=CVE-2019-9718
epss 0.01903 https://api.first.org/data/v1/epss?cve=CVE-2019-9718
epss 0.01903 https://api.first.org/data/v1/epss?cve=CVE-2019-9718
cvssv3 4.3 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 4.3 https://nvd.nist.gov/vuln/detail/CVE-2019-9718
cvssv3.1 6.5 https://nvd.nist.gov/vuln/detail/CVE-2019-9718
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-9718.json
https://api.first.org/data/v1/epss?cve=CVE-2019-9718
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-15822
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1999011
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11338
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-12730
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9718
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/1f00c97bc3475c477f3c468cf2d924d5761d0982
https://github.com/FFmpeg/FFmpeg/commit/23ccf3cabb4baf6e8af4b1af3fcc59c904736f21
https://seclists.org/bugtraq/2019/May/60
https://www.debian.org/security/2019/dsa-4449
http://www.securityfocus.com/bid/107382
1708097 https://bugzilla.redhat.com/show_bug.cgi?id=1708097
926666 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=926666
cpe:2.3:a:ffmpeg:ffmpeg:3.2:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:ffmpeg:ffmpeg:3.2:*:*:*:*:*:*:*
cpe:2.3:a:ffmpeg:ffmpeg:4.1:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:ffmpeg:ffmpeg:4.1:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
CVE-2019-9718 https://nvd.nist.gov/vuln/detail/CVE-2019-9718
USN-3967-1 https://usn.ubuntu.com/3967-1/
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-9718.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2019-9718
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2019-9718
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.82483
EPSS Score 0.01903
Published At Aug. 14, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:29:10.528639+00:00 Alpine Linux Importer Import https://secdb.alpinelinux.org/v3.15/community.json 37.0.0