Vulnerability Description
Fraunhofer HHI VVdeC before 3.2.1 contains a heap use-after-free vulnerability that allows attackers to corrupt memory by redefining an ALF adaptation parameter set id still referenced by slices. Attackers can supply a crafted VVC bitstream that, with multithreaded decoding, makes worker threads dereference freed APS objects in CABACReader::readAlf() and AdaptiveLoopFilter::reconstructCoeff(), causing crashes or heap corruption.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/fraunhoferhhi/vvdec
- https://github.com/fraunhoferhhi/vvdec/blob/v3.2.0/source/Lib/CommonLib/Paramete
- 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/CABACRe
- https://github.com/fraunhoferhhi/vvdec/commit/1eddb30c4b8e02f3d13ba24aa7e52f1aa7
- https://github.com/fraunhoferhhi/vvdec/issues/390
- https://github.com/fraunhoferhhi/vvdec/issues/391
- https://www.vulncheck.com/advisories/fraunhofer-hhi-vvdec-before-3.2.1-heap-use-
FAQ
What is CVE-2026-124307?
CVE-2026-124307 is a vulnerability with a CVSS score of 5.8 (MEDIUM). Fraunhofer HHI VVdeC before 3.2.1 contains a heap use-after-free vulnerability that allows attackers to corrupt memory by redefining an ALF adaptation parameter set id still referenced by slices. Atta...
How severe is CVE-2026-124307?
CVE-2026-124307 has been rated MEDIUM with a CVSS base score of 5.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-124307?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.