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Linux kernel before 5.4.14 Concurrent Execution using Shared Resource with Improper Synchronization (‘Race Condition’) Vulnerability

Summary

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.

Credit:

The information has been provided by Greg Kroah-Hartman

The original article can be found at:https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.14

Details

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.”

Vulnerable Systems:

Linux kernel before 5.4.14

CVE Information:

CVE-2020-12652

Disclosure Timeline:
Published Date:5/5/2020

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