CVE-2026-34183: Unbounded Memory Growth in the QUIC PATH_CHALLENGE Handler

Overview

Severity

High (CVSS 7.5)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Status

Not Exploited

Patch Tuesday

2026-Jun

Released

2026-06-13

EPSS Score

0.04% (percentile: 11.8%)

Affected Products (5)

Other

• 21217-17084
• 21370-17084
• 21264-17084
• 21400-17084
• 21433-17084

Revision History

• 2026-06-13: Information published.