SUSE-SU-2026:3398-1 Security update for rsyslog
Not scored
Published
Check this codebase for SUSE-SU-2026:3398-1 and fix it if it is affected.
What it is: SUSE-SU-2026:3398-1 is a denial of service vulnerability in rsyslog, published on 29 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of SUSE-SU-2026:3398-1 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-2026-3398-1/ (Markdown: https://insights.sbomify.com/SUSE-SU-2026-3398-1/index.md)
An attacker can cause a denial of service in rsyslog via oversized frames during TCP input recovery, requiring a security patch.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is SUSE-SU-2026:3398-1?
SUSE-SU-2026:3398-1 is a denial of service vulnerability in rsyslog, published on 29 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
This update for rsyslog fixes the following issue
- input sequence during oversize-frame recovery in imptcp can cause denial of service (bsc#1271910).
Which versions are affected by SUSE-SU-2026:3398-1?
Linux distribution packages (2)
rsyslog SUSE:Linux Enterprise Server 15 SP6-LTSS | All versions | 8.2406.0-150600.12.13.1 |
rsyslog SUSE:Linux Enterprise Server for SAP Applications 15 SP6 | All versions | 8.2406.0-150600.12.13.1 |
How do I fix SUSE-SU-2026:3398-1?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is SUSE-SU-2026:3398-1 being exploited?
There is no known exploitation of SUSE-SU-2026:3398-1 in the wild and no public exploit code.