# CVE-2020-14305: Memory corruption in kernel

> An out-of-bounds write in the Linux kernel H.323 connection tracking allows remote attackers to crash the system, causing denial of service.

- **Severity:** High 8.1 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/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:** 2 Dec 2020
- **Updated:** 4 Aug 2024
- **Also known as:** A-174904512, ASB-A-174904512, DEBIAN-CVE-2020-14305, GHSA-44qh-vx3p-466m, UBUNTU-CVE-2020-14305

## What is CVE-2020-14305?

CVE-2020-14305 is a high-severity memory corruption vulnerability in Linux kernel, published on 2 Dec 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An out-of-bounds memory write flaw was found in how the Linux kernel’s Voice Over IP H.323 connection tracking functionality handled connections on ipv6 port 1720. This flaw allows an unauthenticated remote user to crash the system, causing a denial of service. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2020-14305?

It affects 6 products.


Products: Linux kernel, Netapp A250 Firmware, Netapp Aff 500f Firmware, Netapp Cloud Backup, Netapp Fas 500f Firmware, Netapp Solidfire Baseboard Management Controller Firmware.

## How do I fix CVE-2020-14305?

Apply the vendor's patch.

## Is CVE-2020-14305 being exploited?

There is no known exploitation of CVE-2020-14305 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-2020-14305 and fix it if it is affected.

What it is: CVE-2020-14305 is a high-severity memory corruption vulnerability in Linux kernel, published on 2 Dec 2020. 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-2020-14305 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-2020-14305/ (Markdown: https://insights.sbomify.com/CVE-2020-14305/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-14305
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-14305
- OSV: https://osv.dev/vulnerability/CVE-2020-14305

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-14305/
Summaries are generated and may contain mistakes; the official description above is the record.