# CVE-2022-3787: Privilege escalation in device-mapper-multipath

> Local attackers can escalate privileges to root by manipulating multipath setup via UNIX domain sockets due to improper access control handling.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 29 Mar 2023
- **Updated:** 18 Feb 2025
- **Also known as:** GHSA-m46g-8pc6-m8q7, RHSA-2022:7928, RHSA-2022:8453, RLSA-2022:7928, RLSA-2022:8453

## What is CVE-2022-3787?

CVE-2022-3787 is a high-severity vulnerability in Redhat Enterprise Linux, published on 29 Mar 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability was found in the device-mapper-multipath. The device-mapper-multipath allows local users to obtain root access, exploited alone or in conjunction with CVE-2022-41973. Local users that are able to write to UNIX domain sockets can bypass access controls and manipulate the multipath setup. This issue occurs because an attacker can repeat a keyword, which is mishandled when arithmetic ADD is used instead of bitwise OR. This could lead to local privilege escalation to root.

Weakness: CWE-285 (Improper Authorization)

## Which versions are affected by CVE-2022-3787?

It affects 2 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `device-mapper-multipath` | Red Hat:enterprise_linux:8::baseos | All versions | 0:0.8.4-28.el8_7.1 |
| `device-mapper-multipath` | Red Hat:enterprise_linux:9::baseos | All versions | 0:0.8.7-12.el9_1.1 |
| `device-mapper-multipath` | Rocky Linux:8 | All versions | 0:0.8.4-28.el8_7.1 |
| `device-mapper-multipath` | Rocky Linux:9 | All versions | 0:0.8.7-12.el9_1.1 |

Products: Redhat Device-Mapper-Multipath, Redhat Enterprise Linux.

## How do I fix CVE-2022-3787?

Apply the vendor's patch.

## Is CVE-2022-3787 being exploited?

There is no known exploitation of CVE-2022-3787 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-3787 and fix it if it is affected.

What it is: CVE-2022-3787 is a high-severity vulnerability in Redhat Enterprise Linux, published on 29 Mar 2023. 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 CVE-2022-3787 in the wild and no public exploit code.

Affected product: Redhat Enterprise Linux. 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/CVE-2022-3787/ (Markdown: https://insights.sbomify.com/CVE-2022-3787/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-3787
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-3787
- OSV: https://osv.dev/vulnerability/CVE-2022-3787

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-3787/
Summaries are generated and may contain mistakes; the official description above is the record.