CVE-2026-30754: n/a
Description
CVE-2026-30754 is a high severity memory corruption vulnerability in FFmpeg versions before 8.1. It occurs in the RTP encoding process, specifically in the nal_send function of libavformat/rtpenc_h264_hevc.c, where a negative size parameter is passed to memcpy when handling crafted H.264/HEVC RTP streams. This flaw was identified using AddressSanitizer.
CVSS v3.1
Score 8.8high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a memory corruption issue in FFmpeg prior to version 8.1. The flaw is triggered during RTP encoding of H.264/HEVC streams, where the nal_send function passes a negative size (-3) to memcpy, leading to unsafe memory operations. The issue was discovered through AddressSanitizer detection. No patch links are provided in the data, and no known exploits are reported in the wild.
Potential Impact
Successful exploitation could lead to high impact including confidentiality, integrity, and availability compromise due to memory corruption. The CVSS score of 8.8 reflects the potential for remote exploitation without privileges and with low attack complexity, but requiring user interaction.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, avoid processing untrusted RTP streams encoded with H.264/HEVC using vulnerable FFmpeg versions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-03-04T00:00:00.000Z
- State
- PUBLISHED
Threat ID: 6aa07231acd9273b4931f6ac
Added to database: 09/08/2026, 20:38:09 UTC
Last enriched: 09/16/2026, 02:33:59 UTC
Last updated: 10/21/2026, 13:20:21 UTC
Views: 51
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