CVE-2026-124308— Fraunhofer HHI VVdeC before 3.2.1 Use-After-Free via DecLibRecon::createSubPicRefBufs

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 在 3.2.1 版本之前存在一个堆释放后使用（heap use-after-free）漏洞。该漏洞位于函数中，原因是函数在等待挂起的任务完成之前，就清除了。攻击者可向使用两个或更多线程的解码器提供特制的多子画面（multi-subpicture）VVC 比特流，从而引发堆内存损坏或导致解码器崩溃。

CVSS 5.8 · 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 Use-After-Free via DecLibRecon::createSubPicRefBufs

Source: CVE Program / CVE List V5

Vulnerability Description

Fraunhofer HHI VVdeC before 3.2.1 contains a heap use-after-free vulnerability in DecLibRecon::createSubPicRefBufs because decompressPicture clears m_subPicExtTasks without waiting for pending tasks. Attackers can supply a crafted multi-subpicture VVC bitstream to decoders using two or more threads, causing heap memory corruption or a decoder crash.

Source: CVE Program / CVE List V5

CVSS Information

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

Source: CVE Program / CVE List V5

Vulnerability Type

释放后使用

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-2026-124308

#	POC Description	Source Link	Shenlong Link

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No public POC found.

III. Intelligence Information for CVE-2026-124308

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Other References for CVE-2026-124308 (7)

https://github.com/fraunhoferhhi/vvdec/blob/v3.2.0/source/Lib/DecoderLib/DecLibRecon.cpp#L405-L420 technical-description
https://github.com/fraunhoferhhi/vvdec/issues/392 issue-tracking
https://github.com/fraunhoferhhi/vvdec/commit/8a0def8ba6050412d33e69a6f1e66e287b039083 patch
https://github.com/fraunhoferhhi/vvdec/blob/v3.2.0/source/Lib/DecoderLib/DecLibRecon.cpp#L538-L542 technical-description
https://github.com/fraunhoferhhi/vvdec product
https://github.com/fraunhoferhhi/vvdec/issues/403 issue-tracking
https://www.vulncheck.com/advisories/fraunhofer-hhi-vvdec-before-3.2.1-use-after-free-via-declibrecon-createsubpicrefbufs third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-124308

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-2026-124309	6.1 MEDIUM	Fraunhofer HHI VVdeC before 3.2.1 Heap Out-of-Bounds Read via SEIReader::xParseSEIScalable
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-416