# CVE-2026-124311: Fraunhofer HHI VVdeC through 3.2.1 NULL Pointer Dereference via InterPrediction::xPredInterBlk

Status: published. Published: 2026-11-07. Updated: 2026-11-07.

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.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulnCheck) — https://github.com/fraunhoferhhi/vvdec/commit/fb73aca37b48f89814f57edbc8072a37d47bbe06

## Affected products and versions

- fraunhoferhhi / vvdec (fraunhoferhhi/vvdec): ≥ 0; ≤ 3.2.1 (affected, semver). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 6.8 (medium); CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 5.5 (medium); CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H; source: CNA: VulnCheck

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-476

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/fraunhoferhhi/vvdec/issues/420 (CNA: VulnCheck; issue-tracking)

- https://github.com/fraunhoferhhi/vvdec/commit/fb73aca37b48f89814f57edbc8072a37d47bbe06 (CNA: VulnCheck; patch)

- https://github.com/fraunhoferhhi/vvdec/blob/v3.2.1/source/Lib/CommonLib/InterPrediction.cpp#L790-L796 (CNA: VulnCheck; technical-description)

- https://github.com/fraunhoferhhi/vvdec (CNA: VulnCheck; product)

- https://www.vulncheck.com/advisories/fraunhofer-hhi-vvdec-through-3.2.1-null-pointer-dereference-via-interprediction-xpredinterblk (CNA: VulnCheck; third-party-advisory)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-124311; retrieved 2026-11-07; source updated 2026-11-07

Revision: c0d04a9e7eefb26df8b9966b27f1afaa7f06e607dfbc097b3a8e8dab1752999f

Canonical: https://y2.dev/cve/CVE-2026-124311

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