# CVE-2015-2922: Security feature bypass in n/a

> Remote attackers can bypass hop-limit security controls by sending crafted IPv6 Router Advertisement messages, affecting Linux kernel network stacks.

- **Severity:** Low 3.3 (`AV:A/AC:L/Au:N/C:N/I:N/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 27 May 2015
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2015-2922, GHSA-h2xq-wm46-j26f, UBUNTU-CVE-2015-2922

## What is CVE-2015-2922?

CVE-2015-2922 is a low-severity vulnerability in Debian Debian Linux, published on 27 May 2015. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The ndisc_router_discovery function in net/ipv6/ndisc.c in the Neighbor Discovery (ND) protocol implementation in the IPv6 stack in the Linux kernel before 3.19.6 allows remote attackers to reconfigure a hop-limit setting via a small hop_limit value in a Router Advertisement (RA) message.

Weakness: CWE-17

## Which versions are affected by CVE-2015-2922?

It affects 6 products.


Products: Debian Debian Linux, Fedoraproject Fedora, Linux kernel, Oracle Linux, Oracle Solaris, Redhat Enterprise Mrg.

## How do I fix CVE-2015-2922?

Upgrade to a fixed version.

## Is CVE-2015-2922 being exploited?

There is no known exploitation of CVE-2015-2922 in the wild and no public exploit code.

## Other vulnerabilities in Debian Debian Linux

- [CVE-2015-3306](https://insights.sbomify.com/CVE-2015-3306/): ProFTPD Improper Access Control (critical 10.0, exploited in the wild)
- [CVE-2025-49113](https://insights.sbomify.com/CVE-2025-49113/): RoundCube Webmail Deserialization of Untrusted Data (critical 9.9, exploited in the wild)
- [CVE-2026-24061](https://insights.sbomify.com/CVE-2026-24061/): GNU InetUtils Argument Injection (critical 9.8, exploited in the wild)
- [CVE-2025-39682](https://insights.sbomify.com/CVE-2025-39682/): Linux Kernel Improper Check for Unusual or Exceptional Conditions (critical 9.8, exploited in the wild)
- [CVE-2024-9680](https://insights.sbomify.com/CVE-2024-9680/): Mozilla Firefox Use-After-Free (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2015-2922 and fix it if it is affected.

What it is: CVE-2015-2922 is a low-severity vulnerability in Debian Debian Linux, published on 27 May 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-2015-2922 in the wild and no public exploit code.

Affected product: Debian Debian 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-2015-2922/ (Markdown: https://insights.sbomify.com/CVE-2015-2922/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2015-2922
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2015-2922
- OSV: https://osv.dev/vulnerability/CVE-2015-2922

---
From sbomify Insights: https://insights.sbomify.com/CVE-2015-2922/
Summaries are generated and may contain mistakes; the official description above is the record.