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TI-2026-58356 Aliases CVE-2026-84894GHSA-mqcv-532f-gp47

Use after free in Meta Platforms moxygen

Priority LOW 38CWE-416Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.

Summary

In moxygen before commit 004123dd24c3, MoQSession::dataStreamReadLoop keeps using a stream read handle after reading a FIN, which invalidates the handle under proxygen's WebTransport API. A remote peer can trigger the stale use by opening a data stream that names an unknown track alias and carries the FIN in the same write.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00255 17th percentileScored 2026-11-07
Fix Fixed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

No affected products listed by the sources yet.

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-84894
  2. 2026-10-03 Alias added: GHSA-mqcv-532f-gp47

References

Other 2

  • TI-2025-34672 An integer overflow vulnerability in the loading of ExecuTorch models can cause… CVSS 3.1CRITICAL 9.8
  • TI-2025-34671 Heap-based buffer overflow in Meta Platforms ExecuTorch CVSS 3.1CRITICAL 9.8
  • TI-2025-34670 Out-of-bounds read in Meta Platforms ExecuTorch CVSS 3.1CRITICAL 9.8
  • TI-2025-34669 Heap-based buffer overflow in Meta Platforms ExecuTorch CVSS 3.1CRITICAL 9.8
  • TI-2025-21707 Integer overflow in Meta Platforms ExecuTorch CVSS 3.1CRITICAL 9.8
  • TI-2025-21706 Integer overflow in Meta Platforms ExecuTorch CVSS 3.1CRITICAL 9.8
See all 12 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences