# CVE-2015-8104: Denial of service in n/a

> Guest OS users can cause host OS panic or hang by triggering many debug exceptions in the KVM subsystem.

- **Severity:** Critical 10.0 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 16 Nov 2015
- **Updated:** 23 Apr 2025
- **Also known as:** DEBIAN-CVE-2015-8104, GHSA-878r-5qjm-6859, UBUNTU-CVE-2015-8104

## What is CVE-2015-8104?

CVE-2015-8104 is a critical denial of service vulnerability in Canonical Ubuntu Linux, published on 16 Nov 2015. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The KVM subsystem in the Linux kernel through 4.2.6, and Xen 4.3.x through 4.6.x, allows guest OS users to cause a denial of service (host OS panic or hang) by triggering many #DB (aka Debug) exceptions, related to svm.c.

Weakness: CWE-399

## Which versions are affected by CVE-2015-8104?

It affects 6 products.


Products: Canonical Ubuntu Linux, Debian Debian Linux, Linux kernel, Oracle Solaris, Oracle Vm Virtualbox, Xen Xen.

## How do I fix CVE-2015-8104?

Apply the vendor's patch.

## Is CVE-2015-8104 being exploited?

There is no known exploitation of CVE-2015-8104 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-2015-8104 and fix it if it is affected.

What it is: CVE-2015-8104 is a critical denial of service vulnerability in Canonical Ubuntu Linux, published on 16 Nov 2015. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2015-8104 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-2015-8104/ (Markdown: https://insights.sbomify.com/CVE-2015-8104/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2015-8104
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2015-8104
- OSV: https://osv.dev/vulnerability/CVE-2015-8104

---
From sbomify Insights: https://insights.sbomify.com/CVE-2015-8104/
Summaries are generated and may contain mistakes; the official description above is the record.