A heap overflow in the ff_sws_alphablendaway function (libswscale/alphablend.c) of FFmpeg git-master commit 722a217 allows attackers to cause a… (CVE-2026-38347)

The ff_sws_alphablendaway function in FFmpeg's libswscale/alphablend.c file contains a heap overflow vulnerability as identified in git-master commit 722a217. This vulnerability can be triggered by an attacker supplying specially crafted input, resulting in a Denial of Service condition. There is no CVSS score or detailed impact metrics available, and no patch or remediation details have been disclosed in the provided information.

Exploitation of this heap overflow vulnerability can cause a Denial of Service (DoS) in affected FFmpeg instances. There is no evidence of other impacts such as code execution or data corruption from the provided data. No known exploits in the wild have been reported.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or workaround information is available in the provided data.