Libav: 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… (CVE-2026-64831)
Description
FFmpeg versions 8.0 through 8.1.2 contain a stack buffer overflow vulnerability in the Vulkan HEVC hardware decoder. This vulnerability allows remote attackers to overwrite return addresses and adjacent stack frames by supplying a crafted HEVC/H.265 bitstream with a malicious vps_num_hrd_parameters value, potentially leading to arbitrary code execution. A patch is available to address this issue.
CVSS v3.1
Score 8.8high
Affected software
pkg:deb/ubuntu/libav?arch=source&distro=esm-infra-legacy/trustypkg:deb/ubuntu/ffmpeg?arch=source&distro=stonkingpkg:deb/ubuntu/ffmpeg?arch=source&distro=esm-apps/resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability identified as CVE-2026-64831 affects FFmpeg versions 8.0 through 8.1.2 in the Vulkan HEVC hardware decoder component. It is a stack buffer overflow caused by improper handling of the vps_num_hrd_parameters value in HEVC/H.265 bitstreams. Exploitation allows remote attackers to overwrite return addresses and adjacent stack frames, which can result in arbitrary code execution. The CVSS v3.1 base score is 8.8, indicating a high severity impact on confidentiality, integrity, and availability. Multiple Ubuntu package versions are affected. A patch is available to remediate this vulnerability.
Potential Impact
Successful exploitation of this vulnerability can lead to arbitrary code execution by remote attackers without requiring privileges. This impacts confidentiality, integrity, and availability of affected systems running vulnerable FFmpeg versions with Vulkan HEVC hardware decoding enabled.
Mitigation Recommendations
A patch is available for this vulnerability. Users should apply the official updates from their vendors or maintainers to upgrade FFmpeg to a fixed version beyond 8.1.2. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-mqq7-j9mq-9jwq
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-64831"]
- Database Specific Severity
- HIGH
- Cvss Version
- 4.0
Threat ID: 6a6151269c2644c7f8da630c
Added to database: 07/22/2026, 23:24:22 UTC
Last enriched: 10/18/2026, 03:40:12 UTC
Last updated: 10/21/2026, 13:20:23 UTC
Views: 125
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