# CVE-2016-1885: Integer overflow in n/a

> Local attackers can trigger a kernel panic via an integer signedness error in the amd64_set_ldt function, causing denial of service.

- **Severity:** Medium 6.2 (`CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 8 Apr 2016
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-vc7v-9ghj-gp9f

## What is CVE-2016-1885?

CVE-2016-1885 is a medium-severity vulnerability in Freebsd Freebsd, published on 8 Apr 2016. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Integer signedness error in the amd64_set_ldt function in sys/amd64/amd64/sys_machdep.c in FreeBSD 9.3 before p39, 10.1 before p31, and 10.2 before p14 allows local users to cause a denial of service (kernel panic) via an i386_set_ldt system call, which triggers a heap-based buffer overflow.

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2016-1885?

It affects 1 product.


Products: Freebsd Freebsd.

## How do I fix CVE-2016-1885?

No fix has been published for CVE-2016-1885 yet. Limit exposure of the affected software until one is available.

## Is CVE-2016-1885 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2016-1885 exists.

Public exploit code:

- FreeBSD 10.2 (x64) - 'amd64_set_ldt' Heap Overflow (exploitdb)

## Other vulnerabilities in Freebsd Freebsd

- [CVE-2018-17160](https://insights.sbomify.com/CVE-2018-17160/): Memory corruption in FreeBSD (critical 10.0)
- [CVE-2014-3954](https://insights.sbomify.com/CVE-2014-3954/): Memory corruption in n/a (critical 10.0)
- [CVE-2006-4304](https://insights.sbomify.com/CVE-2006-4304/): Memory corruption in n/a (critical 10.0)
- [CVE-2006-0226](https://insights.sbomify.com/CVE-2006-0226/): Integer overflow in n/a (critical 10.0)
- [CVE-2004-0002](https://insights.sbomify.com/CVE-2004-0002/): Denial of service in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-1885 and fix it if it is affected.

What it is: CVE-2016-1885 is a medium-severity vulnerability in Freebsd Freebsd, published on 8 Apr 2016. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2016-1885 exists.

Affected product: Freebsd Freebsd. 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-2016-1885/ (Markdown: https://insights.sbomify.com/CVE-2016-1885/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-1885
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-1885
- OSV: https://osv.dev/vulnerability/CVE-2016-1885

---
From sbomify Insights: https://insights.sbomify.com/CVE-2016-1885/
Summaries are generated and may contain mistakes; the official description above is the record.