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MEDIUM

CVE-2019-15031

CVSS v3

4.4

MEDIUM

EPSS Score

0.6 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • CVE-2019-15031 Red Hat Product Security145 products fixed · 16 known affected

    kernel: powerpc: local user can read vector registers of other users' processes via an interrupt

    kernel-rt as a component of Red Hat Enterprise Linux 8 · kernel-rt-core as a component of Red Hat Enterprise Linux 8 · kernel-rt-debug as a component of Red Hat Enterprise Linux 8

  • RHSA-2020:1493 Red Hat Product Security25 products fixed

    Red Hat Security Advisory: kernel-alt security and bug fix update

  • RHSA-2020:1372 Red Hat Product Security120 products fixed

    Red Hat Security Advisory: kernel security and bug fix update

Full record on NVD

Description

In 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.

Technical details

Published
2019-09-13

Frequently asked questions

What is CVE-2019-15031?

In 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.

Is CVE-2019-15031 actively exploited?

Active exploitation of CVE-2019-15031 has not been confirmed. Its EPSS score was 0.6% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-15031?

CVE-2019-15031 has a CVSS v3 base score of 4.4 (MEDIUM severity).

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