Heap Overflow Vulnerability in FFmpeg Affects Multiple Versions
CVE-2026-38347

7.5HIGH

Key Information:

Vendor

FFmpeg

Status
FFmpeg
Vendor
CVE Published:
27 August 2026

What is CVE-2026-38347?

A heap overflow vulnerability exists in the ff_sws_alphablendaway function found in libswscale/alphablend.c of FFmpeg. Attackers can exploit this flaw by sending a specially crafted input, which may result in a Denial of Service (DoS) condition, disrupting the normal operation of systems utilizing affected versions.

References

https://trac.ffmpeg.org/ticket/11692

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.