CVE-2019-12456

NameCVE-2019-12456
DescriptionAn 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 because the doubly fetched value is not used
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)buster4.19.249-2vulnerable (unimportant)
buster (security)4.19.304-1vulnerable (unimportant)
bullseye5.10.209-2vulnerable (unimportant)
bullseye (security)5.10.205-2vulnerable (unimportant)
bookworm6.1.76-1vulnerable (unimportant)
bookworm (security)6.1.69-1vulnerable (unimportant)
trixie6.6.15-2vulnerable (unimportant)
sid6.7.9-2vulnerable (unimportant)

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsource(unstable)(unfixed)unimportant

Notes

The double-fetched value is not used after the second fetch, thus an invalid issue
from security impact perspective. CVE should probably be rejected.

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