# CVE-2018-9415: Use after free in Android

> A double free vulnerability in the Android kernel allows local attackers with system privileges to escalate privileges.

- **Severity:** High 7.8 (`CVSS:3.0/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:** 6 Nov 2018
- **Updated:** 16 Sep 2024
- **Also known as:** DEBIAN-CVE-2018-9415, GHSA-vfgj-wgwr-rg52, UBUNTU-CVE-2018-9415

## What is CVE-2018-9415?

CVE-2018-9415 is a high-severity use after free vulnerability in Canonical Ubuntu Linux, published on 6 Nov 2018. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

In driver_override_store and driver_override_show of bus.c, there is a possible double free due to improper locking. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. Product: Android Versions: Android kernel Android ID: A-69129004 References: Upstream kernel.

Weakness: CWE-415 (Double Free)

## Which versions are affected by CVE-2018-9415?

It affects 2 products.


Products: Canonical Ubuntu Linux, Google Android.

## How do I fix CVE-2018-9415?

Apply the vendor's patch.

## Is CVE-2018-9415 being exploited?

There is no known exploitation of CVE-2018-9415 in the wild and no public exploit code.

## Other vulnerabilities in Canonical Ubuntu Linux

- [CVE-2020-11651](https://insights.sbomify.com/CVE-2020-11651/): SaltStack Salt Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2020-7247](https://insights.sbomify.com/CVE-2020-7247/): OpenSMTPD Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2019-16928](https://insights.sbomify.com/CVE-2019-16928/): Exim Out-of-bounds Write (critical 9.8, exploited in the wild)
- [CVE-2018-6789](https://insights.sbomify.com/CVE-2018-6789/): Exim Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2015-2590](https://insights.sbomify.com/CVE-2015-2590/): Oracle Java SE and Java SE Embedded Remote Code Execution (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-9415 and fix it if it is affected.

What it is: CVE-2018-9415 is a high-severity use after free vulnerability in Canonical Ubuntu Linux, published on 6 Nov 2018. 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-2018-9415 in the wild and no public exploit code.

Affected product: Canonical Ubuntu 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-2018-9415/ (Markdown: https://insights.sbomify.com/CVE-2018-9415/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-9415
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-9415
- OSV: https://osv.dev/vulnerability/CVE-2018-9415

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-9415/
Summaries are generated and may contain mistakes; the official description above is the record.