VVdeC before 3.2.1 has heap use-after-free (CVE-2026-124307)
A crafted VVC bitstream that redefines an ALF APS can hit freed memory; the fix commit is 1eddb30.
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CVE-2026-124307
Heap use-after-free in Fraunhofer HHI VVdeC before 3.2.1
- CVSS 4.0
- 5.8 medium
- EPSS
- —
- Published
- ·
- Modified
AI analysisSummaries by Vani AI
Fraunhofer HHI VVdeC before 3.2.1 has a heap use-after-free when an ALF adaptation parameter set id still referenced by slices is redefined. A local attacker who can supply a crafted VVC bitstream, with user interaction and multithreaded decoding, can make worker threads dereference freed APS objects in CABACReader::readAlf() and AdaptiveLoopFilter::reconstructCoeff(), causing crashes or heap corruption.
What to do: Upgrade Fraunhofer HHI VVdeC to 3.2.1 or later.
| Product | Affected | Fixed in |
|---|---|---|
| Fraunhofer HHI VVdeC | before 3.2.1 | 3.2.1 |
Estimated exposure
nicheNo basis for an estimate.
Order-of-magnitude estimate by the model from install counts, market share and public scan data it knows; verify before quoting.
Description · NVD
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.
- Weakness
- CWE-416
- Vector
- CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X