CVE-2026-124309— Fraunhofer HHI VVdeC before 3.2.1 Heap Out-of-Bounds Read via SEIReader::xParseSEIScalableNesting

Quick assessment

Affected

fraunhoferhhi vvdec

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Fraunhofer HHI VVdeC 3.2.1 之前版本在函数中存在一个堆越界读取漏洞。该漏洞源于将 SEI 包装对象而非其有效载荷进行类型转换，导致攻击者可读取超出堆分配范围的内存。攻击者可构造包含嵌套缓冲周期 SEI 的可扩展嵌套 SEI 的 VVC 比特流，从而引发解码器崩溃或窃取相邻堆内存数据。

CVSS 6.1 · Medium Updated Nov 07, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

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Vulnerability Information

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Vulnerability Title

Fraunhofer HHI VVdeC before 3.2.1 Heap Out-of-Bounds Read via SEIReader::xParseSEIScalableNesting

Source: CVE Program / CVE List V5

Vulnerability Description

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.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H

Source: CVE Program / CVE List V5

Vulnerability Type

跨界内存读

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
fraunhoferhhi	vvdec	0 ~ 3.2.1	-

II. Public POCs for CVE-2026-124309

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-124309

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Other References for CVE-2026-124309 (6)

https://github.com/fraunhoferhhi/vvdec/blob/v3.2.0/source/Lib/DecoderLib/SEIread.cpp#L586-L592 technical-description
https://github.com/fraunhoferhhi/vvdec/issues/397 issue-tracking
https://github.com/fraunhoferhhi/vvdec product
https://github.com/fraunhoferhhi/vvdec/blob/v3.2.0/source/Lib/CommonLib/Slice.h#L644 technical-description
https://github.com/fraunhoferhhi/vvdec/commit/1d657c7a822987d2ff935e9c227c5faf5318ca06 patch
https://www.vulncheck.com/advisories/fraunhofer-hhi-vvdec-before-3.2.1-heap-out-of-bounds-read-via-seireader-xparseseiscalablenesting third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-124309

Same Patch Batch · fraunhoferhhi · 2026-11-07 · 6 CVEs total

CVE-2026-124310	6.1 MEDIUM	Fraunhofer HHI VVdeC before 3.2.1 Out-of-Bounds Read via Slice::getRefPic
CVE-2026-124308	5.8 MEDIUM	Fraunhofer HHI VVdeC before 3.2.1 Use-After-Free via DecLibRecon::createSubPicRefBufs
CVE-2026-124307	5.8 MEDIUM	Fraunhofer HHI VVdeC before 3.2.1 Heap Use-After-Free via ALF APS Redefinition
CVE-2026-124311	5.5 MEDIUM	Fraunhofer HHI VVdeC through 3.2.1 NULL Pointer Dereference via InterPrediction::xPredInte
CVE-2026-124312	4.7 MEDIUM	Fraunhofer HHI VVdeC through 3.2.1 Heap Out-of-Bounds Read via CodingStructure::getColInfo

IV. Related Vulnerabilities

Same product: vvdec

Same vendor: fraunhoferhhi

Same weakness: CWE-125