CVE-2026-78002: Rsyslog: rsyslog: denial of service via heap buffer overflow in rainerscript replace() function

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/E:U

Exploit Status

Not Exploited

Patch Tuesday

2026-Aug

Released

2026-09-02

Last Updated

2026-10-02

EPSS Score

0.80% (percentile: 55.8%)

Affected Products (3)

Other

• 21037-17084
• 21917-17084
• 21838-17084

Security Updates (1)

• Security Update

Revision History

• 2026-09-02: Information published.
• 2026-09-07: Information published.
• 2026-09-09: Information published.
• 2026-09-11: Information published.
• 2026-09-23: Information published.
• 2026-09-25: Information published.
• 2026-10-02: Information published.