# SUSE-SU-2026:23646-1: Security update for multipath-tools

> Multiple memory corruption and path traversal flaws in multipath-tools allow local attackers to cause denial of service or potentially execute code.

- **Severity:** Not scored
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 7 Sep 2026

## What is SUSE-SU-2026:23646-1?

SUSE-SU-2026:23646-1 is a memory corruption vulnerability in multipath-tools, published on 7 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

This update for multipath-tools fixes the following issues:

- Heap Out-of-Bounds Read in Custom Format String Parser via Trailing `%` (bsc#1277205).
- Path traversal in device-mapper-multipath failed_wwids management (bsc#1277210).
- SCSI PRIN READ FULL STATUS responses can cause heap buffer overflows (bsc#1277212).
- Local Denial of Service via Blocking IPC Send Operations (bsc#1277199).
- Heap Out-of-Bounds Read in GPT Header Validation (bsc#1277209).
- DoS on multipathd socket by exhausting connections (bsc#1277203).
- Heap out-of-bounds read in device-mapper-multipath ALUA RTPG parsing (bsc#1277208).

Changes for multipath-tools:

- Update to version 0.12.4+278+suse.9cf9c5c.
- Add missing NULL check in DM parser (gh#opensvc/multipath-tools#155).

## Which versions are affected by SUSE-SU-2026:23646-1?


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `multipath-tools` | SUSE:Linux Enterprise Server 16.0 | All versions | 0.12.4+278+suse.9cf9c5c-160000.1.1 |
| `multipath-tools` | SUSE:Linux Enterprise Server for SAP applications 16.0 | All versions | 0.12.4+278+suse.9cf9c5c-160000.1.1 |

## How do I fix SUSE-SU-2026:23646-1?

Upgrade to a fixed version.

## Is SUSE-SU-2026:23646-1 being exploited?

There is no known exploitation of SUSE-SU-2026:23646-1 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for SUSE-SU-2026:23646-1 and fix it if it is affected.

What it is: SUSE-SU-2026:23646-1 is a memory corruption vulnerability in multipath-tools, published on 7 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of SUSE-SU-2026:23646-1 in the wild and no public exploit code.

Affected product: multipath-tools. 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-2026-23646-1/ (Markdown: https://insights.sbomify.com/SUSE-SU-2026-23646-1/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/SUSE-SU-2026:23646-1

---
From sbomify Insights: https://insights.sbomify.com/SUSE-SU-2026-23646-1/
Summaries are generated and may contain mistakes; the official description above is the record.