Vulnerability 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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/fraunhoferhhi/vvdec
- https://github.com/fraunhoferhhi/vvdec/blob/v3.2.0/source/Lib/CommonLib/Slice.h#
- https://github.com/fraunhoferhhi/vvdec/blob/v3.2.0/source/Lib/DecoderLib/SEIread
- https://github.com/fraunhoferhhi/vvdec/commit/1d657c7a822987d2ff935e9c227c5faf53
- https://github.com/fraunhoferhhi/vvdec/issues/397
- https://www.vulncheck.com/advisories/fraunhofer-hhi-vvdec-before-3.2.1-heap-out-
FAQ
What is CVE-2026-124309?
CVE-2026-124309 is a vulnerability with a CVSS score of 6.1 (MEDIUM). 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...
How severe is CVE-2026-124309?
CVE-2026-124309 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-124309?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.