Out-of-bounds Read in Fraunhoferhhi Vvdec
CVE-2026-124312
Fraunhofer HHI VVdeC through 3.2.1 contains a heap out-of-bounds read vulnerability that allows attackers to crash the decoder by supplying a collocated picture of different resolution. Attackers can craft a VVC bitstream enabling TMVP with a smaller collocated reference picture, causing getColInfo to read past the colMotion allocation when error concealment is enabled.
Vulnerability class: Buffer Overflow
Published .
CVSS v3 metric
CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/fraunhoferhhi/vvdec (product)
- github.com/fraunhoferhhi/vvdec/blob/v3.2.1/source/Lib/CommonLib/CodingStructure… (technical-description)
- github.com/fraunhoferhhi/vvdec/blob/v3.2.1/source/Lib/CommonLib/Slice.cpp (technical-description)
- github.com/fraunhoferhhi/vvdec/commit/0695c06221c27b3680fec9851ac2cf46b2195ea9 (patch)
- github.com/fraunhoferhhi/vvdec/issues/422 (issue-tracking)
- www.vulncheck.com/advisories/fraunhofer-hhi-vvdec-through-3.2.1-heap-out-of-bou… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-124312?
- CVE-2026-124312 is a medium-severity vulnerability in Fraunhoferhhi Vvdec, classified under Out-of-bounds Read. CVSS score: 4.7/10. Published 2026-11-07.
- How severe is CVE-2026-124312?
- Medium severity. CVSS v3 base score is 4.7 out of 10.