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."
The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.
| Link | Tags |
|---|---|
| https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.14 | release notes vendor advisory |
| https://github.com/torvalds/linux/commit/28d76df18f0ad5bcf5fa48510b225f0ed262a99b | third party advisory patch |
| https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=28d76df18f0ad5bcf5fa48510b225f0ed262a99b | patch vendor advisory |
| https://security.netapp.com/advisory/ntap-20200608-0001/ | |
| https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html | mailing list |
| https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html | mailing list |
| https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html | mailing list |
| https://www.debian.org/security/2020/dsa-4698 | vendor advisory |
| http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html | vendor advisory |