CVE-2019-12456 — An issue was discovered in the MPT3COMMAND case in _ctl_ioctl_main in drivers/sc

An issue was discovered in the MPT3COMMAND case in _ctl_ioctl_main in drivers/scsi/mpt3sas/mpt3sas_ctl.c in the Linux kernel through 5.1.5. It allows local users to cause a denial of service or possibly have unspecified other impact by changing the value of ioc_number between two

01What is this vulnerability?

An issue was discovered in the MPT3COMMAND case in _ctl_ioctl_main in drivers/scsi/mpt3sas/mpt3sas_ctl.c in the Linux kernel through 5.1.5. It allows local users to cause a denial of service or possibly have unspecified other impact by changing the value of ioc_number between two kernel reads of that value, aka a "double fetch" vulnerability. NOTE: a third party reports that this is unexploitable…

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: 2019-05-30T11:38:24.000Z
• Last modified: 2024-08-04T23:17:40.035Z

09References

• git.kernel.org — https://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git/commit/?h=5.3/scsi-…
• lkml.org — https://lkml.org/lkml/2019/5/29/1164
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro…
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro…
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00039.html
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00040.html
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00048.html
• bugzilla.redhat.com — https://bugzilla.redhat.com/show_bug.cgi?id=1717182
• support.f5.com — https://support.f5.com/csp/article/K84310302
• support.f5.com — https://support.f5.com/csp/article/K84310302?utm_source=f5support&amp%3Butm_medi…