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.
History

Thu, 01 Oct 2026 04:30:00 +0000

Type Values Removed Values Added
Title Use‑After‑Free in moxygen Data Stream Read Loop Causes Service Crash

Wed, 30 Sep 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 30 Sep 2026 16:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}


Tue, 29 Sep 2026 13:30:00 +0000

Type Values Removed Values Added
First Time appeared Meta Platforms Inc
Meta Platforms Inc moxygen
Vendors & Products Meta Platforms Inc
Meta Platforms Inc moxygen

Mon, 28 Sep 2026 19:00:00 +0000

Type Values Removed Values Added
Description 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.
References

cve-icon MITRE

Status: PUBLISHED

Assigner: Meta

Published: 2026-09-28T18:40:55.707Z

Updated: 2026-09-30T15:05:50.817Z

Reserved: 2026-09-02T14:52:36.354Z

Link: CVE-2026-84894

cve-icon Vulnrichment

Updated: 2026-09-30T15:03:42.745Z

cve-icon NVD

Status : Deferred

Published: 2026-09-28T19:16:50.213

Modified: 2026-09-30T19:57:08.043

Link: CVE-2026-84894

cve-icon Redhat

No data.