GrapheneOS before 2026050400 allows attackers to discover the real IP address of a VPN user as a consequence of a registerQuicConnectionClosePayload optimization, because an application can let system_server transmit UDP traffic on its behalf. This occurs when the "Block connections without VPN" and "Always-on VPN" settings are enabled.

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

No data.

No data.

No data.

References
Link Providers
https://cyberinsider.com/grapheneos-fixes-android-vpn-leak-google-refused-to-patch/ cve-icon cve-icon
https://grapheneos.org/releases#2026050400 cve-icon cve-icon
https://lowlevel.fun/posts/tiny-udp-cannon-android-vpn-bypass/ cve-icon cve-icon
History

Sun, 10 May 2026 00:30:00 +0000

Type Values Removed Values Added
Title Android VPN IP Leakage via System Server UDP Path

Sat, 09 May 2026 22:30:00 +0000

Type Values Removed Values Added
Description GrapheneOS before 2026050400 allows attackers to discover the real IP address of a VPN user as a consequence of a registerQuicConnectionClosePayload optimization, because an application can let system_server transmit UDP traffic on its behalf. This occurs when the "Block connections without VPN" and "Always-on VPN" settings are enabled.
Weaknesses CWE-441
References
Metrics cvssV3_1

{'score': 2.2, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N'}
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2026-05-09T22:07:59.122Z

Updated: 2026-05-09T22:12:55.615Z

Reserved: 2026-05-09T22:07:58.636Z

Link: CVE-2026-45182

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-05-09T23:16:32.277

Modified: 2026-05-09T23:16:32.277

Link: CVE-2026-45182

cve-icon Redhat

No data.