# CVE-2022-47942: Memory corruption in n/a

> A heap-based buffer overflow in the Linux kernel's ksmbd allows attackers to execute arbitrary code or escalate privileges via malformed SMB commands.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 23 Dec 2022
- **Updated:** 15 Apr 2025
- **Also known as:** AZL-12097, DEBIAN-CVE-2022-47942, GHSA-g2h7-7gvv-x89v, UBUNTU-CVE-2022-47942

## What is CVE-2022-47942?

CVE-2022-47942 is a high-severity memory corruption vulnerability in Linux kernel, published on 23 Dec 2022. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

An issue was discovered in ksmbd in the Linux kernel 5.15 through 5.19 before 5.19.2. There is a heap-based buffer overflow in set_ntacl_dacl, related to use of SMB2_QUERY_INFO_HE after a malformed SMB2_SET_INFO_HE command.

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

## Which versions are affected by CVE-2022-47942?

It affects 1 product.


Products: Linux kernel.

## How do I fix CVE-2022-47942?

Apply the vendor's patch.

## Is CVE-2022-47942 being exploited?

There is no known exploitation of CVE-2022-47942 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-2022-47942 and fix it if it is affected.

What it is: CVE-2022-47942 is a high-severity memory corruption vulnerability in Linux kernel, published on 23 Dec 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2022-47942 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-2022-47942/ (Markdown: https://insights.sbomify.com/CVE-2022-47942/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-47942
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-47942
- OSV: https://osv.dev/vulnerability/CVE-2022-47942

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-47942/
Summaries are generated and may contain mistakes; the official description above is the record.