Description
In proxygen from v2026.04.06.00 until v2026.09.28.00, QuicWtSession::closeSession accesses its member fields after calling the base QuicWtSessionBase::closeSession method. The base method notifies the session handler, which may release the last reference to the session and destroy it.
Published: 2026-09-28
Score: n/a
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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History

Mon, 28 Sep 2026 23:15:00 +0000

Type Values Removed Values Added
First Time appeared Facebook
Facebook proxygen
Vendors & Products Facebook
Facebook proxygen

Mon, 28 Sep 2026 22:45:00 +0000

Type Values Removed Values Added
Title Use‑After‑Free in Facebook Proxygen’s QUIC Session Handling Leading to Potential Code Execution
Weaknesses CWE-416

Mon, 28 Sep 2026 21:00:00 +0000

Type Values Removed Values Added
Description In proxygen from v2026.04.06.00 until v2026.09.28.00, QuicWtSession::closeSession accesses its member fields after calling the base QuicWtSessionBase::closeSession method. The base method notifies the session handler, which may release the last reference to the session and destroy it.
References

Subscriptions

Facebook Proxygen
cve-icon MITRE

Status: PUBLISHED

Assigner: Meta

Published:

Updated: 2026-09-28T20:44:34.886Z

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

Link: CVE-2026-84895

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-09-28T21:17:19.027

Modified: 2026-09-28T21:17:19.130

Link: CVE-2026-84895

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-28T23:00:07Z

Weaknesses