CVE-2026-89476: sctp: fix stream->outcnt underflow on duplicate RECONF responses

Overview

Severity

Medium (CVSS 6.5)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-Sep

Released

2026-09-13

Last Updated

2026-09-14

EPSS Score

0.60% (percentile: 47.0%)

Affected Products (1)

Other

• 21684-17084

Security Updates (1)

• Security Update

Revision History

• 2026-09-13: Information published.
• 2026-09-14: Information published.