ffmpeg — security advisory
FFmpeg before commit 983dae9 contains an out-of-bounds read in the AV1 RTP packetizer (libavformat/rtpenc_av1.c). The keyframe detection loop that searches for a sequence header OBU advanced its pointer and remaining-size counter by the encoded header length plus the OBU payload size without first bounding the OBU size against the remaining data. A crafted OBU size causes the remaining-size counter to wrap to a positive value, causing the next loop iteration to dereference a pointer beyond the end of the packet buffer. A crafted AV1 input packet muxed to RTP triggers the out-of-bounds read.
- Products
- ffmpeg
- Affected versions
- 7:7.1.1-1, 7:7.1.2-1, 7:7.1.3-1, 7:8.0-1, 7:8.0-2, 7:8.0.1-1, 7:8.0.1-2, 7:8.0.1-3, 7:8.1-1, 7:8.1-2, 7:8.1-3, 7:8.1.1-1, 7:8.1.1-2, 7:8.1.1-3, 7:8.1.1-4, 7:8.1.2-1, 7:8.1.2-2, 7:9.0-1, 7:9.0.1-1
- Fixed versions
- 7:9.0.2-1
- CVEs
- CVE-2026-75147
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 17:53 UTC · Revision 2
Source evidence
FFmpeg before commit 983dae9 contains an out-of-bounds read in the AV1 RTP packetizer (libavformat/rtpenc_av1.c). The keyframe detection loop that searches for a sequence header OBU advanced its pointer and remaining-size counter by the encoded header length plus the OBU payload size without first bounding the OBU size against the remaining data. A crafted OBU size causes the remaining-size counter to wrap to a positive value, causing the next loop iteration to dereference a pointer beyond the end of the packet buffer. A crafted AV1 input packet muxed to RTP triggers the out-of-bounds read.
osv:DEBIAN-CVE-2026-75147
ffmpeg
Fixed versions: 7:9.0.2-1
Complete source record
{
"id": "b4feabc9b9922893a83781f8b3b56401ebabee7d7ffe709074b2d3b14fa0d6ca",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-75147",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-75147",
"summary": "FFmpeg before commit 983dae9 contains an out-of-bounds read in the AV1 RTP packetizer (libavformat/rtpenc_av1.c). The keyframe detection loop that searches for a sequence header OBU advanced its pointer and remaining-size counter by the encoded header length plus the OBU payload size without first bounding the OBU size against the remaining data. A crafted OBU size causes the remaining-size counter to wrap to a positive value, causing the next loop iteration to dereference a pointer beyond the end of the packet buffer. A crafted AV1 input packet muxed to RTP triggers the out-of-bounds read.",
"evidence": "osv:DEBIAN-CVE-2026-75147",
"products": [
{
"name": {
"value": "ffmpeg",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "7:9.0.2-1",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": [
{
"value": "7:7.1.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "7:7.1.2-1",
"evidence": "/affected/0/versions"
},
{
"value": "7:7.1.3-1",
"evidence": "/affected/0/versions"
},
{
"value": "7:8.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "7:8.0-2",
"evidence": "/affected/0/versions"
},
{
"value": "7:8.0.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "7:8.0.1-2",
"evidence": "/affected/0/versions"
},
{
"value": "7:8.0.1-3",
"evidence": "/affected/0/versions"
},
{
"value": "7:8.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "7:8.1-2",
"evidence": "/affected/0/versions"
},
{
"value": "7:8.1-3",
"evidence": "/affected/0/versions"
},
{
"value": "7:8.1.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "7:8.1.1-2",
"evidence": "/affected/0/versions"
},
{
"value": "7:8.1.1-3",
"evidence": "/affected/0/versions"
},
{
"value": "7:8.1.1-4",
"evidence": "/affected/0/versions"
},
{
"value": "7:8.1.2-1",
"evidence": "/affected/0/versions"
},
{
"value": "7:8.1.2-2",
"evidence": "/affected/0/versions"
},
{
"value": "7:9.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "7:9.0.1-1",
"evidence": "/affected/0/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2026-75147",
"aliases": [
"DEBIAN-CVE-2026-75147"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "7:9.0.2-1"
}
]
}
],
"package": {
"name": "ffmpeg",
"purl": "pkg:deb/debian/ffmpeg?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"7:7.1.1-1",
"7:7.1.2-1",
"7:7.1.3-1",
"7:8.0-1",
"7:8.0-2",
"7:8.0.1-1",
"7:8.0.1-2",
"7:8.0.1-3",
"7:8.1-1",
"7:8.1-2",
"7:8.1-3",
"7:8.1.1-1",
"7:8.1.1-2",
"7:8.1.1-3",
"7:8.1.1-4",
"7:8.1.2-1",
"7:8.1.2-2",
"7:9.0-1",
"7:9.0.1-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-75147.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-27T09:47:43.170233779Z",
"provider": "osv",
"upstream": [
"CVE-2026-75147"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-75147"
]
},
"related_cves": [
{
"value": "CVE-2026-75147",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 461421,
"published_at": "2026-08-19T17:21:13.29+00:00"
}