# GSD-2023-1002037: efi: fix potential NULL deref in efi_mem_reserve_persistent

> A potential NULL pointer dereference in the Linux kernel's EFI memory reservation code could lead to a system crash.

- **Severity:** Not scored
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Not stated
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 13 Feb 2023

## What is GSD-2023-1002037?

GSD-2023-1002037 is a vulnerability in Kernel, published on 13 Feb 2023. 

### Official description

efi: fix potential NULL deref in efi_mem_reserve_persistent

This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven.
This ID is fixed in Linux Kernel version v5.15.93 by commit d8fc0b5fb3e816a4a8684bcd3ed02cbef0fce23c, it was introduced in version v5.2 by commit 18df7577adae6c6c778bf774b3aebcacbc1fb439. For more details please see the references link.

## Which versions are affected by GSD-2023-1002037?

1 open source package ship an affected version, including Kernel.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `Kernel` | Linux | All versions | None |

## How do I fix GSD-2023-1002037?

No fix has been published for GSD-2023-1002037 yet. Limit exposure of the affected software until one is available.

## Is GSD-2023-1002037 being exploited?

There is no known exploitation of GSD-2023-1002037 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for GSD-2023-1002037 and fix it if it is affected.

What it is: GSD-2023-1002037 is a vulnerability in Kernel, published on 13 Feb 2023. 
Exploitation: There is no known exploitation of GSD-2023-1002037 in the wild and no public exploit code.

Affected packages and fixed versions:
- Kernel (Linux): affected all versions; no fix listed

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/GSD-2023-1002037/ (Markdown: https://insights.sbomify.com/GSD-2023-1002037/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/GSD-2023-1002037

---
From sbomify Insights: https://insights.sbomify.com/GSD-2023-1002037/
Summaries are generated and may contain mistakes; the official description above is the record.