CVE-2026-124309 Fraunhofer HHI VVdeC before 3.2.1 Heap Out-of-Bounds Read via SEIReader::xParseSEIScalableNesting
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-124309?
CVE-2026-124309 is a medium-severity vulnerability in fraunhoferhhi vvdec, published on 7 Nov 2026.
Official description
Fraunhofer HHI VVdeC before 3.2.1 contains a heap out-of-bounds read vulnerability in SEIReader::xParseSEIScalableNesting that allows attackers to read past heap allocations by casting the SEI wrapper object instead of its payload. Attackers can supply a crafted VVC bitstream with a scalable nesting SEI containing a nested buffering period SEI to crash the decoder or copy adjacent heap memory.
Weakness: CWE-125
Which versions are affected by CVE-2026-124309?
How do I fix CVE-2026-124309?
No fix has been published for CVE-2026-124309 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-124309 being exploited?
There is no known exploitation of CVE-2026-124309 in the wild and no public exploit code.
Sources
Also known as GHSA-w892-xhp2-gg6x.