Medium
Security advisory
FFmpeg 2.8 and 4.2.3 has a use-after-free via a crafted EXTINF duration in an m3u8 file because parse_playlist in libavformat/hls.c frees a pointer, and later that pointer is accessed in av_probe_input_format3 in libavformat/format.c.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2020-13904
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 09:26 UTC · Revision 1
Source evidence
FFmpeg 2.8 and 4.2.3 has a use-after-free via a crafted EXTINF duration in an m3u8 file because parse_playlist in libavformat/hls.c frees a pointer, and later that pointer is accessed in av_probe_input_format3 in libavformat/format.c.
osv:CVE-2020-13904
Complete source record
{
"id": "f70f03cdc614e515986b3812d34417a0b4c6cf04abd65137775050622f63b4d8",
"url": "https://osv.dev/vulnerability/CVE-2020-13904",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2020-13904",
"summary": "FFmpeg 2.8 and 4.2.3 has a use-after-free via a crafted EXTINF duration in an m3u8 file because parse_playlist in libavformat/hls.c frees a pointer, and later that pointer is accessed in av_probe_input_format3 in libavformat/format.c.",
"evidence": "osv:CVE-2020-13904",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2020-13904",
"aliases": [
"CVE-2020-13904"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://git.ffmpeg.org/ffmpeg.git",
"type": "GIT",
"events": [
{
"introduced": "58142a27ea96bf9246586a91a82db85e37646933"
},
{
"last_affected": "d3b963cc41824a3c5b2758ac896fb23e20a87875"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:ffmpeg:ffmpeg:2.8:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.8"
},
{
"last_affected": "2.8"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:ffmpeg:ffmpeg:4.2.3:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.2.3"
},
{
"last_affected": "4.2.3"
}
],
"source": "CPE_STRING"
}
]
}
}
],
"versions": [
"2.8",
"4.2.3",
"n4.2.3",
"n4.2.2",
"n4.2.1",
"n4.2",
"n4.2-dev",
"n4.1-dev",
"n3.5-dev",
"n3.4-dev",
"n3.3-dev",
"n3.2-dev",
"n3.1-dev",
"n2.9-dev",
"n2.8-dev"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-13904.json"
}
},
{
"ranges": [
{
"repo": "https://github.com/ffmpeg/ffmpeg",
"type": "GIT",
"events": [
{
"introduced": "58142a27ea96bf9246586a91a82db85e37646933"
},
{
"last_affected": "d3b963cc41824a3c5b2758ac896fb23e20a87875"
},
{
"fixed": "6959358683c7533f586c07a766acc5fe9544d8b2"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:ffmpeg:ffmpeg:2.8:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.8"
},
{
"last_affected": "2.8"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:ffmpeg:ffmpeg:4.2.3:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.2.3"
},
{
"last_affected": "4.2.3"
}
],
"source": "CPE_STRING"
},
{
"range": [
{
"fixed": "6959358683c7533f586c07a766acc5fe9544d8b2"
}
],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
"versions": [
"2.8",
"4.2.3",
"n2.8.16",
"n4.2.3",
"n4.2.2",
"n4.2.1",
"n4.2",
"n4.2-dev",
"n2.8.15",
"n4.1-dev",
"n2.8.14",
"n2.8.13",
"n3.5-dev",
"n2.8.12",
"n3.4-dev",
"n2.8.11",
"n2.8.10",
"n2.8.9",
"n3.3-dev",
"n2.8.8",
"n2.8.7",
"n3.2-dev",
"n3.1-dev",
"n2.8.6",
"n2.8.5",
"n2.8.4",
"n2.8.3",
"n2.8.2",
"n2.8.1",
"n2.8",
"n2.9-dev",
"n2.8-dev"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-13904.json",
"vanir_signatures": [
{
"id": "CVE-2020-13904-2b8821e2",
"digest": {
"threshold": 0.9,
"line_hashes": [
"158144811077034995109933837677768601857",
"281751093908803107971940014393508807726",
"240764462031438200492845385032705040109",
"15703913043383878175200160282698241320",
"138080608107875226115977774548120949879",
"259048102838479733394805058517030239279",
"17084527969274049166290416022132557131",
"269990059958938381327368365588722984632"
]
},
"source": "https://github.com/ffmpeg/ffmpeg/commit/6959358683c7533f586c07a766acc5fe9544d8b2",
"target": {
"file": "libavformat/hls.c"
},
"deprecated": false,
"signature_type": "Line",
"signature_version": "v1"
},
{
"id": "CVE-2020-13904-f5815e55",
"digest": {
"length": 4983,
"function_hash": "45061495392761575669141487341416533816"
},
"source": "https://github.com/ffmpeg/ffmpeg/commit/6959358683c7533f586c07a766acc5fe9544d8b2",
"target": {
"file": "libavformat/hls.c",
"function": "parse_playlist"
},
"deprecated": false,
"signature_type": "Function",
"signature_version": "v1"
}
],
"vanir_signatures_modified": "2026-10-24T14:22:37Z"
}
}
],
"modified": "2026-10-24T14:22:37.852794441Z",
"provider": "osv",
"references": [
"https://patchwork.ffmpeg.org/project/ffmpeg/patch/20200529033905.41926-1-lq%40chinaffmpeg.org/",
"https://lists.debian.org/debian-lts-announce/2020/07/msg00022.html",
"https://security.gentoo.org/glsa/202007-58",
"https://usn.ubuntu.com/4431-1/",
"https://www.debian.org/security/2020/dsa-4722",
"https://trac.ffmpeg.org/ticket/8673",
"https://github.com/FFmpeg/FFmpeg/commit/6959358683c7533f586c07a766acc5fe9544d8b2"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*"
],
"vendor_product": "canonical:ubuntu_linux",
"extracted_events": [
{
"range": [
{
"introduced": "16.04"
},
{
"last_affected": "16.04"
},
{
"introduced": "18.04"
},
{
"last_affected": "18.04"
},
{
"introduced": "20.04"
},
{
"last_affected": "20.04"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
],
"vendor_product": "debian:debian_linux",
"extracted_events": [
{
"range": [
{
"introduced": "9.0"
},
{
"last_affected": "9.0"
},
{
"introduced": "10.0"
},
{
"last_affected": "10.0"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2020-13904",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 443673,
"published_at": "2020-06-07T19:15:09.703+00:00"
}