NULL pointer dereference in Fraunhoferhhi Vvdec
CVE-2026-124311
Fraunhofer HHI VVdeC through 3.2.1 contains a NULL pointer dereference vulnerability in InterPrediction::xPredInterBlk that allows attackers to crash the decoder by switching SPS to enable reference wrap-around. Attackers can supply a crafted VVC bitstream activating a new SPS with sps_ref_wraparound_enabled_flag set, causing reads from missing PIC_RECON_WRAP buffers and denial of service.
Published .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/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/InterPrediction… (technical-description)
- github.com/fraunhoferhhi/vvdec/commit/fb73aca37b48f89814f57edbc8072a37d47bbe06 (patch)
- github.com/fraunhoferhhi/vvdec/issues/420 (issue-tracking)
- www.vulncheck.com/advisories/fraunhofer-hhi-vvdec-through-3.2.1-null-pointer-de… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-124311?
- CVE-2026-124311 is a medium-severity vulnerability in Fraunhoferhhi Vvdec, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2026-11-07.
- How severe is CVE-2026-124311?
- Medium severity. CVSS v3 base score is 5.5 out of 10.