CVE-2026-38347 Memory corruption in n/a
Attackers can cause a denial of service via a crafted input due to a heap overflow in FFmpeg's alphablend function.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-38347?
CVE-2026-38347 is a high-severity memory corruption vulnerability in n/a, published on 27 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A heap overflow in the ff_sws_alphablendaway function (libswscale/alphablend.c) of FFmpeg git-master commit 722a217 allows attackers to cause a Denial of Service (DoS) via a crafted input.
Weakness: CWE-122
Which versions are affected by CVE-2026-38347?
How do I fix CVE-2026-38347?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-38347 being exploited?
There is no known exploitation of CVE-2026-38347 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-38347, GHSA-gpjg-x49v-595v, UBUNTU-CVE-2026-38347.