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OpenAdvisories
High · 7.5 CVE-2026-84894 EUVD-2026-88433GHSA-mqcv-532f-gp47

In moxygen before commit 004123dd24c3, MoQSession::dataStreamReadLoop keeps using a stream read handle after reading a FIN, which invalidat…

Published Sep 28, 2026 · Updated Sep 30, 2026 · Assigned by Meta

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.

Affected products

VendorProductAffectedFixed
Meta Platforms moxygen — —

References