DEBIAN-CVE-2026-61548
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-61548
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-61548.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-61548
- Upstream
- Published
- 2026-09-18T17:16:58Z
- Modified
- 2026-09-19T05:00:11Z
- Severity
-
- 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
Rsyslog is a rocket-fast system for log processing. From 7.5.4 until 8.2606.0, the optional mmpstrucdata plugin's parseSD_PARAM function in plugins/mmpstrucdata/mmpstrucdata.c stores RFC5424 parameter values in a fixed pVal[32 * 1024] stack buffer and calls parsePARAM_VALUE without supplying the destination size. A remote unauthenticated attacker whose crafted RFC5424 message reaches an action using mmpstrucdata can provide a structured-data parameter larger than that buffer when MaxMessageSize permits it, causing an attacker-controlled stack overwrite. Deployments that do not install and use the plugin, or whose effective message-size limit remains below the required threshold, are not affected by this issue. The demonstrated impact is a crash and interruption of log collection; code execution is not demonstrated. This issue is fixed in version 8.2606.0.
- References
Affected packages
Debian:12 / rsyslog
Package
- Name
- rsyslog
- Purl
- pkg:deb/debian/rsyslog?arch=source&distro=bookworm
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
Affected versions
8.*
Debian:13 / rsyslog
Package
- Name
- rsyslog
- Purl
- pkg:deb/debian/rsyslog?arch=source&distro=trixie
Debian:14 / rsyslog
Package
- Name
- rsyslog
- Purl
- pkg:deb/debian/rsyslog?arch=source&distro=forky
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affectedFixed8.2606.0-4