CVE-2019-15031

NameCVE-2019-15031
DescriptionIn the Linux kernel through 5.2.14 on the powerpc platform, a local user can read vector registers of other users' processes via an interrupt. To exploit the venerability, a local user starts a transaction (via the hardware transactional memory instruction tbegin) and then accesses vector registers. At some point, the vector registers will be corrupted with the values from a different local Linux process, because MSR_TM_ACTIVE is misused in arch/powerpc/kernel/process.c.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitylow

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)jessie3.16.56-1+deb8u1fixed
jessie (security)3.16.76-1fixed
stretch4.9.189-3fixed
stretch (security)4.9.189-3+deb9u2fixed
buster4.19.67-2+deb10u1vulnerable
buster (security)4.19.67-2+deb10u2vulnerable
bullseye, sid5.3.9-3fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsource(unstable)5.2.17-1
linuxsourcejessie(not affected)
linuxsourcestretch(not affected)

Notes

[stretch] - linux <not-affected> (Vulnerable code introduced later)
[jessie] - linux <not-affected> (Vulnerable code introduced later)
https://git.kernel.org/linus/a8318c13e79badb92bc6640704a64cc022a6eb97

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