CVE-2020-12652 — The __mptctl_ioctl function in drivers/message/fusion/mptctl

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 v

01What is this vulnerability?

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…

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2020-05-05T04:23:59.000Z
• Last modified: 2024-08-04T12:04:22.748Z

09References

• cdn.kernel.org — https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.14
• github.com — https://github.com/torvalds/linux/commit/28d76df18f0ad5bcf5fa48510b225f0ed262a99…
• git.kernel.org — https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=28d76…
• security.netapp.com — https://security.netapp.com/advisory/ntap-20200608-0001/
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html
• www.debian.org — https://www.debian.org/security/2020/dsa-4698
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html