# CVE-2015-8615: Denial of service in n/a

> Local HVM guest users can cause a denial of service by triggering excessive console logging through frequent callback method changes.

- **Severity:** Medium 5.0 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 8 Jan 2016
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2015-8615, GHSA-5p4h-mjwj-j325

## What is CVE-2015-8615?

CVE-2015-8615 is a medium-severity denial of service vulnerability in Xen Xen, published on 8 Jan 2016. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The hvm_set_callback_via function in arch/x86/hvm/irq.c in Xen 4.6 does not limit the number of printk console messages when logging the new callback method, which allows local HVM guest OS users to cause a denial of service via a large number of changes to the callback method (HVM_PARAM_CALLBACK_IRQ).

Weakness: CWE-254

## Which versions are affected by CVE-2015-8615?

It affects 1 product.


Products: Xen Xen.

## How do I fix CVE-2015-8615?

Apply the vendor's patch.

## Is CVE-2015-8615 being exploited?

There is no known exploitation of CVE-2015-8615 in the wild and no public exploit code.

## Other vulnerabilities in Xen Xen

- [CVE-2017-10912](https://insights.sbomify.com/CVE-2017-10912/): Privilege escalation in n/a (critical 10.0)
- [CVE-2017-10918](https://insights.sbomify.com/CVE-2017-10918/): Memory corruption in n/a (critical 10.0)
- [CVE-2017-10920](https://insights.sbomify.com/CVE-2017-10920/): Memory corruption in n/a (critical 10.0)
- [CVE-2017-10921](https://insights.sbomify.com/CVE-2017-10921/): Memory corruption in n/a (critical 10.0)
- [CVE-2025-27466](https://insights.sbomify.com/CVE-2025-27466/): Mutiple vulnerabilities in the Viridian interface (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2015-8615 and fix it if it is affected.

What it is: CVE-2015-8615 is a medium-severity denial of service vulnerability in Xen Xen, published on 8 Jan 2016. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2015-8615 in the wild and no public exploit code.

Affected product: Xen Xen. 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-2015-8615/ (Markdown: https://insights.sbomify.com/CVE-2015-8615/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2015-8615
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2015-8615
- OSV: https://osv.dev/vulnerability/CVE-2015-8615

---
From sbomify Insights: https://insights.sbomify.com/CVE-2015-8615/
Summaries are generated and may contain mistakes; the official description above is the record.