November 15, 2026

CVE Watchtower

CVE-2026-124307fraunhoferhhi vvdec Use After Free

NVD

Vulnerability Summary

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.
Severity Level
MEDIUM(5.8)
Published Date
Nov 7, 2026
Last Modified
Nov 9, 2026
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
0.12%Probability
Root Weakness (CWE)
CWE-416: Use After Free ↗
The product reuses or references memory after it has been freed, which can cause a crash or execution of arbitrary code.
CVSS v4.0 Base Metrics — Score 5.8 (MEDIUM)
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
Attack VectorLocal
Attack ComplexityHigh
Attack RequirementsPresent
Privileges RequiredNone
User InteractionPassive
Confidentiality (Vulnerable System)Low
Integrity (Vulnerable System)Low
Availability (Vulnerable System)High
Confidentiality (Subsequent System)None
Integrity (Subsequent System)None
Availability (Subsequent System)None
Show CVSS v3.x metrics (score 5.8)
CVSS v3.1 Base Metrics — Score 5.8 (MEDIUM)
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:H
Attack VectorLocal
Attack ComplexityHigh
Privileges RequiredNone
User InteractionRequired
ScopeUnchanged
ConfidentialityLow
IntegrityLow
AvailabilityHigh

Affected & Patched Versions

Affected Versions
  • fraunhoferhhi vvdec < 3.2.1
Patched Versions
  • fraunhoferhhi vvdec 3.2.1

What to do

Fix it during your normal patch cycle. No exploitation is confirmed yet.

  1. Check whether you run fraunhoferhhi vvdec and which version.
  2. Update to a patched version listed above, then confirm the new version.

Timeline

  • Nov 7, 2026Published
  • Nov 9, 2026Record last modified

Score, severity and exploitation changes are tracked from the day Watchtower started logging them.

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External References

Data last checked: Nov 15, 2026 03:31 UTC