# CVE-2016-8733: Integer overflow in SmartOS

> An integer overflow in the Hyprlofs file system allows attackers to cause a kernel panic or potentially escalate privileges via a crafted ioctl call.

- **Severity:** High 7.8 (`CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/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:** No
- **Published:** 14 Dec 2016
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-9gx4-xhr5-rc9m

## What is CVE-2016-8733?

CVE-2016-8733 is a high-severity vulnerability in Joyent SmartOS, published on 14 Dec 2016. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

An exploitable integer overflow exists in the Joyent SmartOS 20161110T013148Z Hyprlofs file system. The vulnerability is present in the Ioctl system call with the command HYPRLOFS_ADD_ENTRIES when dealing with native file systems. An attacker can craft an input that can cause a kernel panic and potentially be leveraged into a full privilege escalation vulnerability. This vulnerability is distinct from CVE-2016-9031.

Weakness: CWE-190 (Integer Overflow or Wraparound)

## Which versions are affected by CVE-2016-8733?

It affects 1 product.


Products: Joyent Smartos.

## How do I fix CVE-2016-8733?

No fix has been published for CVE-2016-8733 yet. Limit exposure of the affected software until one is available.

## Is CVE-2016-8733 being exploited?

There is no known exploitation of CVE-2016-8733 in the wild and no public exploit code.

## Other vulnerabilities in Joyent SmartOS

- [CVE-2018-1166](https://insights.sbomify.com/CVE-2018-1166/): Use after free in Joyent SmartOS (high 7.8)
- [CVE-2016-9031](https://insights.sbomify.com/CVE-2016-9031/): Integer overflow in SmartOS (high 7.8)
- [CVE-2018-1171](https://insights.sbomify.com/CVE-2018-1171/): Memory corruption in Joyent SmartOS (high 7.0)
- [CVE-2018-1165](https://insights.sbomify.com/CVE-2018-1165/): Memory corruption in Joyent SmartOS (high 7.0)
- [CVE-2016-9032](https://insights.sbomify.com/CVE-2016-9032/): Memory corruption in SmartOS (high 7.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-8733 and fix it if it is affected.

What it is: CVE-2016-8733 is a high-severity vulnerability in Joyent SmartOS, published on 14 Dec 2016. 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-2016-8733 in the wild and no public exploit code.

Affected product: Joyent SmartOS. 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-2016-8733/ (Markdown: https://insights.sbomify.com/CVE-2016-8733/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-8733
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-8733
- OSV: https://osv.dev/vulnerability/CVE-2016-8733

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From sbomify Insights: https://insights.sbomify.com/CVE-2016-8733/
Summaries are generated and may contain mistakes; the official description above is the record.