USN-8598-1: rsyslog vulnerabilities
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.
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Details
Original advisory: https://ubuntu.com/security/notices/USN-8598-1
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-61548 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
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