# CVE-2025-38313: bus: fsl-mc: fix double-free on mc\_dev

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-07-10 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 4.13

## Description

In the Linux kernel, the following vulnerability has been resolved: bus: fsl-mc: fix double-free on mc_dev The blamed commit tried to simplify how the deallocations are done but, in the process, introduced a double-free on the mc_dev variable. In case the MC device is a DPRC, a new mc_bus is allocated and the mc_dev variable is just a reference to one of its fields. In this circumstance, on the error path only the mc_bus should be freed. This commit introduces back the following checkpatch warning which is a false-positive. WARNING: kfree(NULL) is safe and this check is probably not required + if (mc_bus) + kfree(mc_bus);

## 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.
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## 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/12e4431e5078847791936820bd39df9e1ee26d2e
- https://git.kernel.org/stable/c/3135e03a92f6b5259d0a7f25f728e9e7866ede3f
- https://git.kernel.org/stable/c/7002b954c4a8b9965ba0f139812ee4a6f71beac8
- https://git.kernel.org/stable/c/b2057374f326303c86d8423415ab58656eebc695
- https://git.kernel.org/stable/c/4b23c46eb2d88924b93aca647bde9a4b9cf62cf9
- https://git.kernel.org/stable/c/1d5baab39e5b09a76870b345cdee7933871b881f
- https://git.kernel.org/stable/c/873d47114fd5e5a1cad2018843671537cc71ac84
- https://git.kernel.org/stable/c/d694bf8a9acdbd061596f3e7549bc8cb70750a60

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Page: https://cve.now/CVE-2025-38313
JSON: https://cve.now/api/v1/entries/CVE-2025-38313
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