What’s Vulnerable › Vulnerabilities

CVE-2020-12652

• Severity: medium (CVSS 4.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-05-05 · updated 2026-06-17
• Weakness: CWE-362

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."

Affected products

• Linux kernel: before 5.4.14 — fixed in 5.4.14

How to fix

Upgrade to a fixed version: Linux kernel 5.4.14. Check the vendor advisory for mitigations.

References

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

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