# CVE-2019-16413: Denial of service in n/a

> An infinite loop in the Linux kernel's 9p filesystem allows attackers to cause a denial of service on SMP systems.

- **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:** 18 Sep 2019
- **Updated:** 5 Aug 2024
- **Also known as:** DEBIAN-CVE-2019-16413, GHSA-6rqj-653c-2r5w, UBUNTU-CVE-2019-16413

## What is CVE-2019-16413?

CVE-2019-16413 is a high-severity denial of service vulnerability in Linux kernel, published on 18 Sep 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered in the Linux kernel before 5.0.4. The 9p filesystem did not protect i_size_write() properly, which causes an i_size_read() infinite loop and denial of service on SMP systems.

Weakness: CWE-835 (Loop with Unreachable Exit Condition)

## Which versions are affected by CVE-2019-16413?

It affects 1 product.


Products: Linux kernel.

## How do I fix CVE-2019-16413?

Upgrade to a fixed version.

## Is CVE-2019-16413 being exploited?

There is no known exploitation of CVE-2019-16413 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-2019-16413 and fix it if it is affected.

What it is: CVE-2019-16413 is a high-severity denial of service vulnerability in Linux kernel, published on 18 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-2019-16413 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-2019-16413/ (Markdown: https://insights.sbomify.com/CVE-2019-16413/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-16413
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-16413
- OSV: https://osv.dev/vulnerability/CVE-2019-16413

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-16413/
Summaries are generated and may contain mistakes; the official description above is the record.