CVE-2026-112009 smpeg through 2.0.0 Heap Out-of-Bounds Read via MPEGsystem::FillBuffer
Attackers can cause application crashes or read sensitive memory by providing a crafted MPEG file to applications using the smpeg library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-112009?
CVE-2026-112009 is a medium-severity memory corruption vulnerability in icculus smpeg, published on 18 Oct 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
smpeg through 2.0.0 contains a heap out-of-bounds read vulnerability in MPEGsystem::FillBuffer() that allows attackers to read past the 16384-byte buffer by supplying a crafted system header stream table. Attackers can provide an MPEG file whose stream table bytes all set the high bit, which crashes applications opening it through SMPEG_new, SMPEG_new_rwops, or SMPEG_new_data.
Weakness: CWE-125
Which versions are affected by CVE-2026-112009?
How do I fix CVE-2026-112009?
No fix has been published for CVE-2026-112009 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-112009 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-112009 exists.
Sources
Also known as DEBIAN-CVE-2026-112009, GHSA-hhc9-vxgx-6xvc, UBUNTU-CVE-2026-112009.