SUSE-SU-2026:3861-1 Security update for rsyslog
Not scored
Published
Check this codebase for SUSE-SU-2026:3861-1 and fix it if it is affected.
What it is: SUSE-SU-2026:3861-1 is a memory corruption vulnerability in rsyslog, published on 28 Aug 2026.
Exploitation: There is no known exploitation of SUSE-SU-2026:3861-1 in the wild and no public exploit code.
Affected product: rsyslog. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/SUSE-SU-2026-3861-1/ (Markdown: https://insights.sbomify.com/SUSE-SU-2026-3861-1/index.md)
A heap buffer overflow in rsyslog's RainerScript replace function allows attackers to potentially execute code or cause denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not stated
- Attackable
- Not stated
- Victim action needed
- Not stated
- Fix
- Available
What is SUSE-SU-2026:3861-1?
SUSE-SU-2026:3861-1 is a memory corruption vulnerability in rsyslog, published on 28 Aug 2026.
Official description
This update for rsyslog fixes the following issue:
- Heap buffer overflow in the core
RainerScriptreplace()function (bsc#1275926).
Which versions are affected by SUSE-SU-2026:3861-1?
Linux distribution packages (3)
rsyslog SUSE:Linux Enterprise Module for Basesystem 15 SP7 | All versions | 8.2406.0-150700.3.10.1 |
rsyslog SUSE:Linux Enterprise Module for Package Hub 15 SP7 | All versions | 8.2406.0-150700.3.10.1 |
rsyslog SUSE:Linux Enterprise Module for Server Applications 15 SP7 | All versions | 8.2406.0-150700.3.10.1 |
How do I fix SUSE-SU-2026:3861-1?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is SUSE-SU-2026:3861-1 being exploited?
There is no known exploitation of SUSE-SU-2026:3861-1 in the wild and no public exploit code.