# CVE-2022-43945: Memory corruption in linux kernel

> A remote attacker can cause a buffer overflow in the Linux kernel NFSD module, leading to a denial of service.

- **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:** 4 Nov 2022
- **Updated:** 14 Oct 2026
- **Also known as:** AZL-11379, DEBIAN-CVE-2022-43945, GHSA-42x7-fjc5-38vr, UBUNTU-CVE-2022-43945

## What is CVE-2022-43945?

CVE-2022-43945 is a high-severity memory corruption vulnerability in Linux kernel, published on 4 Nov 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Linux kernel NFSD implementation prior to versions 5.19.17 and 6.0.2 are vulnerable to buffer overflow. NFSD tracks the number of pages held by each NFSD thread by combining the receive and send buffers of a remote procedure call (RPC) into a single array of pages. A client can force the send buffer to shrink by sending an RPC message over TCP with garbage data added at the end of the message. The RPC message with garbage data is still correctly formed according to the specification and is passed forward to handlers. Vulnerable code in NFSD is not expecting the oversized request and writes beyond the allocated buffer space. CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness: CWE-770 (Allocation of Resources Without Limits or Throttling), CWE-131 (Incorrect Calculation of Buffer Size)

## Which versions are affected by CVE-2022-43945?

It affects 7 products.


Products: Linux kernel, Netapp Active Iq Unified Manager, Netapp H300s Firmware, Netapp H410c Firmware, Netapp H410s Firmware, Netapp H500s Firmware, Netapp H700s Firmware.

## How do I fix CVE-2022-43945?

Apply the vendor's patch.

## Is CVE-2022-43945 being exploited?

There is no known exploitation of CVE-2022-43945 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-2022-43945 and fix it if it is affected.

What it is: CVE-2022-43945 is a high-severity memory corruption vulnerability in Linux kernel, published on 4 Nov 2022. 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-2022-43945 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-2022-43945/ (Markdown: https://insights.sbomify.com/CVE-2022-43945/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-43945
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-43945
- OSV: https://osv.dev/vulnerability/CVE-2022-43945

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-43945/
Summaries are generated and may contain mistakes; the official description above is the record.