CVE-2026-61548
It was discovered that rsyslog incorrectly handled regex-based TCP framing in the imptcp module. A remote attacker could possibly use this issue to cause rsyslog to crash, resulting in a denial of service. It was discovered that rsyslog incorrectly handled oversized RFC5424 structured data in the mmpstrucdata module. A remote attacker could possibly use this issue to cause rsyslog to crash, resulting in a denial of service. (CVE-2026-61548)
CSIRTS triage
- What
- Improper handling of regex-based TCP framing can cause rsyslog to crash.
- Who is affected
- Users of rsyslog.
- Urgency
- Remediation is critical to prevent denial of service.
- Action
- Update rsyslog to a patched version.
AI-assisted analysis generated from the source advisory — verify against the original.
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Advisory coverage (2)
- high[NEW] [high] rsyslog: Vulnerability allows Denial of Service and potentially code executioncert-bund · 2026-07-24
- unknownUSN-8598-1: rsyslog vulnerabilitiesubuntu · 2026-07-23
External references
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[](https://www.csirts.com/cve/CVE-2026-61548)