# CVE-2019-16995: Denial of service in n/a

> A memory leak in the Linux kernel's HSR device handling can lead to denial of service when port addition fails.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/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:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 30 Sep 2019
- **Updated:** 5 Aug 2024
- **Also known as:** DEBIAN-CVE-2019-16995, GHSA-m4c2-gjmw-g8gc, UBUNTU-CVE-2019-16995

## What is CVE-2019-16995?

CVE-2019-16995 is a high-severity denial of service vulnerability in Linux kernel, published on 30 Sep 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

In the Linux kernel before 5.0.3, a memory leak exits in hsr_dev_finalize() in net/hsr/hsr_device.c if hsr_add_port fails to add a port, which may cause denial of service, aka CID-6caabe7f197d.

Weakness: CWE-401 (Missing Release of Memory after Effective Lifetime)

## Which versions are affected by CVE-2019-16995?

It affects 17 products.


Products: Linux kernel, Netapp Aff A700s Firmware, Netapp Data Availability Services, Netapp H300e Firmware, Netapp H300s Firmware, Netapp H410c Firmware, Netapp H410s Firmware, Netapp H500e Firmware, Netapp H500s Firmware, Netapp H610s Firmware, Netapp H700e Firmware, Netapp H700s Firmware, Netapp Hci Management Node, Netapp Service Processor, Netapp Solidfire, Netapp Steelstore Cloud Integrated Storage, Opensuse Leap.

## How do I fix CVE-2019-16995?

Apply the vendor's patch.

## Is CVE-2019-16995 being exploited?

There is no known exploitation of CVE-2019-16995 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-2019-16995 and fix it if it is affected.

What it is: CVE-2019-16995 is a high-severity denial of service vulnerability in Linux kernel, published on 30 Sep 2019. 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-2019-16995 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-2019-16995/ (Markdown: https://insights.sbomify.com/CVE-2019-16995/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-16995
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-16995
- OSV: https://osv.dev/vulnerability/CVE-2019-16995

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-16995/
Summaries are generated and may contain mistakes; the official description above is the record.