CVE-2026-61548: Rsyslog: mmpstrucdata stack buffer overflow with oversized RFC5424 structured data

Overview

Severity

High (CVSS 8.1)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-Sep

Released

2026-09-20

Last Updated

2026-09-21

EPSS Score

0.59% (percentile: 46.7%)

Affected Products (1)

Other

• 21838-17084

Security Updates (1)

• Security Update

Revision History

• 2026-09-20: Information published.
• 2026-09-21: Information published.