# CVE-2014-2309: Denial of service in n/a

> Remote attackers can cause denial of service via memory consumption by flooding ICMPv6 Router Advertisement packets due to improper route counting in the Linux kernel.

- **Severity:** Medium 6.1 (`AV:A/AC:L/Au:N/C:N/I:N/A:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 11 Mar 2014
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2014-2309, GHSA-fp4w-gxwf-rr44

## What is CVE-2014-2309?

CVE-2014-2309 is a medium-severity denial of service vulnerability in Linux kernel, published on 11 Mar 2014. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The ip6_route_add function in net/ipv6/route.c in the Linux kernel through 3.13.6 does not properly count the addition of routes, which allows remote attackers to cause a denial of service (memory consumption) via a flood of ICMPv6 Router Advertisement packets.

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

## Which versions are affected by CVE-2014-2309?

It affects 3 products.


Products: Linux kernel, Opensuse Opensuse, Suse Linux Enterprise Server.

## How do I fix CVE-2014-2309?

Apply the vendor's patch.

## Is CVE-2014-2309 being exploited?

There is no known exploitation of CVE-2014-2309 in the wild and no public exploit code.

## Other vulnerabilities in Linux kernel

- [CVE-2026-53266](https://insights.sbomify.com/CVE-2026-53266/): Linux Kernel Out-of-Bounds Write (high 8.8, exploited in the wild)
- [CVE-2013-6282](https://insights.sbomify.com/CVE-2013-6282/): Linux Kernel Improper Input Validation (high 8.8, exploited in the wild)
- [CVE-2022-0185](https://insights.sbomify.com/CVE-2022-0185/): Linux Kernel Heap-Based Buffer Overflow (high 8.4, exploited in the wild)
- [CVE-2013-2094](https://insights.sbomify.com/CVE-2013-2094/): Linux Kernel Privilege Escalation (high 8.4, exploited in the wild)
- [CVE-2026-53362](https://insights.sbomify.com/CVE-2026-53362/): Linux Kernel Unspecified (high 7.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2014-2309 and fix it if it is affected.

What it is: CVE-2014-2309 is a medium-severity denial of service vulnerability in Linux kernel, published on 11 Mar 2014. 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-2014-2309 in the wild and no public exploit code.

Affected product: Linux kernel. 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-2014-2309/ (Markdown: https://insights.sbomify.com/CVE-2014-2309/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2014-2309
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2014-2309
- OSV: https://osv.dev/vulnerability/CVE-2014-2309

---
From sbomify Insights: https://insights.sbomify.com/CVE-2014-2309/
Summaries are generated and may contain mistakes; the official description above is the record.