UBUNTU-CVE-2026-64831 (CVE-2026-64831)
Vulnerability from osv_ubuntu – Published: 2026-07-22 17:16 – Updated: 2026-09-09 22:36 – Source website
VLAI
Details
FFmpeg versions 8.0 through 8.1.2 contains a stack buffer overflow vulnerability in the Vulkan HEVC hardware decoder that allows remote attackers to overwrite return addresses and adjacent stack frames by supplying a crafted HEVC/H.265 bitstream. Attackers can embed a malicious vps_num_hrd_parameters value exceeding HEVC_MAX_SUB_LAYERS in any supported container format to overflow stack-allocated arrays in the vk_hevc_end_frame function, potentially achieving arbitrary code execution.
Severity
8.8 (High)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libav-tools",
"binary_version": "6:9.20-0ubuntu0.14.04.1+esm1"
},
{
"binary_name": "libavcodec-extra",
"binary_version": "6:9.20-0ubuntu0.14.04.1+esm1"
},
{
"binary_name": "libavcodec-extra-54",
"binary_version": "6:9.20-0ubuntu0.14.04.1+esm1"
},
{
"binary_name": "libavcodec54",
"binary_version": "6:9.20-0ubuntu0.14.04.1+esm1"
},
{
"binary_name": "libavdevice-extra-53",
"binary_version": "6:9.20-0ubuntu0.14.04.1+esm1"
},
{
"binary_name": "libavdevice53",
"binary_version": "6:9.20-0ubuntu0.14.04.1+esm1"
},
{
"binary_name": "libavfilter-extra-3",
"binary_version": "6:9.20-0ubuntu0.14.04.1+esm1"
},
{
"binary_name": "libavfilter3",
"binary_version": "6:9.20-0ubuntu0.14.04.1+esm1"
},
{
"binary_name": "libavformat-extra-54",
"binary_version": "6:9.20-0ubuntu0.14.04.1+esm1"
},
{
"binary_name": "libavformat54",
"binary_version": "6:9.20-0ubuntu0.14.04.1+esm1"
},
{
"binary_name": "libavresample1",
"binary_version": "6:9.20-0ubuntu0.14.04.1+esm1"
},
{
"binary_name": "libavutil-extra-52",
"binary_version": "6:9.20-0ubuntu0.14.04.1+esm1"
},
{
"binary_name": "libavutil52",
"binary_version": "6:9.20-0ubuntu0.14.04.1+esm1"
},
{
"binary_name": "libswscale-extra-2",
"binary_version": "6:9.20-0ubuntu0.14.04.1+esm1"
},
{
"binary_name": "libswscale2",
"binary_version": "6:9.20-0ubuntu0.14.04.1+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:14.04:LTS",
"name": "libav",
"purl": "pkg:deb/ubuntu/libav@6:9.20-0ubuntu0.14.04.1+esm1?arch=source\u0026distro=esm-infra-legacy/trusty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"6:0.8.7-1ubuntu2",
"6:9.10-1ubuntu1",
"6:9.10-1ubuntu2",
"6:9.10-1ubuntu5",
"6:9.10-1ubuntu6",
"6:9.10-1ubuntu7",
"6:9.11-2ubuntu1",
"6:9.11-2ubuntu2",
"6:9.13-0ubuntu0.14.04.1",
"6:9.14-0ubuntu0.14.04.1",
"6:9.16-0ubuntu0.14.04.1",
"6:9.18-0ubuntu0.14.04.1",
"6:9.20-0ubuntu0.14.04.1",
"6:9.20-0ubuntu0.14.04.1+esm1"
]
},
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "ffmpeg",
"binary_version": "7:8.0.1-3ubuntu2+esm4"
},
{
"binary_name": "libavcodec-extra",
"binary_version": "7:8.0.1-3ubuntu2+esm4"
},
{
"binary_name": "libavcodec-extra62",
"binary_version": "7:8.0.1-3ubuntu2+esm4"
},
{
"binary_name": "libavcodec62",
"binary_version": "7:8.0.1-3ubuntu2+esm4"
},
{
"binary_name": "libavdevice62",
"binary_version": "7:8.0.1-3ubuntu2+esm4"
},
{
"binary_name": "libavfilter-extra",
"binary_version": "7:8.0.1-3ubuntu2+esm4"
},
{
"binary_name": "libavfilter-extra11",
"binary_version": "7:8.0.1-3ubuntu2+esm4"
},
{
"binary_name": "libavfilter11",
"binary_version": "7:8.0.1-3ubuntu2+esm4"
},
{
"binary_name": "libavformat-extra",
"binary_version": "7:8.0.1-3ubuntu2+esm4"
},
{
"binary_name": "libavformat-extra62",
"binary_version": "7:8.0.1-3ubuntu2+esm4"
},
{
"binary_name": "libavformat62",
"binary_version": "7:8.0.1-3ubuntu2+esm4"
},
{
"binary_name": "libavutil60",
"binary_version": "7:8.0.1-3ubuntu2+esm4"
},
{
"binary_name": "libswresample6",
"binary_version": "7:8.0.1-3ubuntu2+esm4"
},
{
"binary_name": "libswscale9",
"binary_version": "7:8.0.1-3ubuntu2+esm4"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:26.04:LTS",
"name": "ffmpeg",
"purl": "pkg:deb/ubuntu/ffmpeg@7:8.0.1-3ubuntu2+esm4?arch=source\u0026distro=esm-apps/resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "7:8.0.1-3ubuntu2+esm4"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"7:7.1.1-1ubuntu4",
"7:7.1.2-1ubuntu3",
"7:7.1.2-1ubuntu4",
"7:7.1.3-1ubuntu1",
"7:8.0.1-2ubuntu1",
"7:8.0.1-3ubuntu1",
"7:8.0.1-3ubuntu2",
"7:8.0.1-3ubuntu2+esm1",
"7:8.0.1-3ubuntu2+esm3"
]
}
],
"aliases": [],
"details": "FFmpeg versions 8.0 through 8.1.2 contains a stack buffer overflow vulnerability in the Vulkan HEVC hardware decoder that allows remote attackers to overwrite return addresses and adjacent stack frames by supplying a crafted HEVC/H.265 bitstream. Attackers can embed a malicious vps_num_hrd_parameters value exceeding HEVC_MAX_SUB_LAYERS in any supported container format to overflow stack-allocated arrays in the vk_hevc_end_frame function, potentially achieving arbitrary code execution.",
"id": "UBUNTU-CVE-2026-64831",
"modified": "2026-09-09T22:36:43Z",
"published": "2026-07-22T17:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-64831"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-64831"
},
{
"type": "REPORT",
"url": "https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23665"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8716-2"
}
],
"related": [
"USN-8716-2"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-64831"
]
}
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
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- Not confirmed: The user expressed doubt about the validity of the vulnerability.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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