CVE-2026-63983: net/sched: fix packet loop on netem when duplicate is on

Overview

Severity

Critical (CVSS 9.8)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-Jul

Released

2026-07-21

Last Updated

2026-09-24

EPSS Score

0.21% (percentile: 10.4%)

Affected Products (4)

Other

• 21580-17084
• 21684-17084
• 21892-17084
• 21932-17084

Revision History

• 2026-07-21: Information published.
• 2026-08-13: Information published.
• 2026-09-23: Information published.
• 2026-09-24: Information published.
• 2026-09-24: Information published.