Fraunhofer HHI vvdec up to 3.2.0 Scalable Nesting SEI Parser xParseSEIScalableNesting out-of-bounds

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Fraunhofer HHI vvdec up to 3.2.0. Affected is the function SEIReader::xParseSEIScalableNesting of the component Scalable Nesting SEI Parser. The manipulation leads to out-of-bounds. This vulnerability is traded as CVE-2026-124309. An attack has to be approached locally. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Fraunhofer HHI vvdec up to 3.2.0. It has been rated as problematic. This issue affects the function SEIReader::xParseSEIScalableNesting of the component Scalable Nesting SEI Parser. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-124309 since 11/07/2026. The exploitation is known to be easy. An attack has to be approached locally. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available.

Upgrading to version 3.2.1 eliminates this vulnerability.

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Productinfo

Vendor

• Fraunhofer HHI

Name

• vvdec

Version

• 3.0
• 3.1
• 3.2.0

CPE 2.3info

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CPE 2.2info

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