CVE-2026-42772: Potential CPU DoS via O(n^2) Fragment Reassembly in QUIC

Overview

Severity

Medium (CVSS 5.3)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-Sep

Released

2026-10-03

EPSS Score

0.33% (percentile: 23.8%)

Affected Products (6)

Other

• 21767-17084
• 21915-17084
• 21819-17084
• 21789-17084
• 21840-17084
• 21918-17084

Revision History

• 2026-10-03: Information published.