CVE-2026-124307
Fraunhofer HHI VVdeC before 3.2.1 Heap Use-After-Free via ALF APS Redefinition
CVSS Score
5.8
EPSS Score
0.0%
EPSS Percentile
0th
Fraunhofer HHI VVdeC before 3.2.1 contains a heap use-after-free vulnerability that allows attackers to corrupt memory by redefining an ALF adaptation parameter set id still referenced by slices. Attackers can supply a crafted VVC bitstream that, with multithreaded decoding, makes worker threads dereference freed APS objects in CABACReader::readAlf() and AdaptiveLoopFilter::reconstructCoeff(), causing crashes or heap corruption.
| CWE | CWE-416 |
| Vendor | fraunhoferhhi |
| Product | vvdec |
| Published | Nov 7, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:H Attack Vector
Local
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
High
Affected Versions
fraunhoferhhi / vvdec
0 < 3.2.1
References
github.com: https://github.com/fraunhoferhhi/vvdec/issues/391 github.com: https://github.com/fraunhoferhhi/vvdec/issues/390 github.com: https://github.com/fraunhoferhhi/vvdec/commit/1eddb30c4b8e02f3d13ba24aa7e52f1aa7b08c01 github.com: https://github.com/fraunhoferhhi/vvdec/blob/v3.2.0/source/Lib/CommonLib/Slice.h#L2570 github.com: https://github.com/fraunhoferhhi/vvdec/blob/v3.2.0/source/Lib/CommonLib/ParameterSetManager.h#L97 github.com: https://github.com/fraunhoferhhi/vvdec/blob/v3.2.0/source/Lib/DecoderLib/CABACReader.cpp#L428-L429 github.com: https://github.com/fraunhoferhhi/vvdec vulncheck.com: https://www.vulncheck.com/advisories/fraunhofer-hhi-vvdec-before-3.2.1-heap-use-after-free-via-alf-aps-redefinition
Credits
Alexander A. Shvedov (sigdevel)