CVE-2019-15031

Published: 09 September 2019

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.

From the Ubuntu security team

It was discovered that the Linux kernel on PowerPC architectures did not properly handle exceptions on interrupts in some situations. A local attacker could use this to expose sensitive information.

Priority

Medium

CVSS 3 base score: 4.4

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
Upstream
Released (5.3~rc8)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (4.15.0-64.73)
Ubuntu 16.04 ESM (Xenial Xerus) Not vulnerable
(4.2.0-16.19)
Ubuntu 14.04 ESM (Trusty Tahr) Not vulnerable
(3.11.0-12.19)
Patches:
Introduced by a7771176b4392fbc3a17399c51a8c11f2f681afe
Fixed by a8318c13e79badb92bc6640704a64cc022a6eb97
linux-aws
Launchpad, Ubuntu, Debian
Upstream
Released (5.3~rc8)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (4.15.0-1050.52)
Ubuntu 16.04 ESM (Xenial Xerus) Not vulnerable
(4.4.0-1001.10)
Ubuntu 14.04 ESM (Trusty Tahr) Not vulnerable
(4.4.0-1002.2)
linux-aws-5.0
Launchpad, Ubuntu, Debian
Upstream
Released (5.3~rc8)
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(5.0.0-1021.24~18.04.1)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-aws-hwe
Launchpad, Ubuntu, Debian
Upstream
Released (5.3~rc8)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 ESM (Xenial Xerus)
Released (4.15.0-1050.52~16.04.1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-azure
Launchpad, Ubuntu, Debian
Upstream
Released (5.3~rc8)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (5.0.0-1020.21~18.04.1)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (4.15.0-1059.64)
Ubuntu 14.04 ESM (Trusty Tahr)
Released (4.15.0-1059.64~14.04.1)
linux-azure-5.3
Launchpad, Ubuntu, Debian
Upstream
Released (5.3~rc8)
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(5.3.0-1007.8~18.04.1)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-azure-edge
Launchpad, Ubuntu, Debian
Upstream
Released (5.3~rc8)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (5.0.0-1020.21~18.04.1)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (4.15.0-1059.64)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-gcp
Launchpad, Ubuntu, Debian
Upstream
Released (5.3~rc8)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (4.15.0-1044.70)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (4.15.0-1044.46)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-gcp-5.3
Launchpad, Ubuntu, Debian
Upstream
Released (5.3~rc8)
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(5.3.0-1008.9~18.04.1)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-gcp-edge
Launchpad, Ubuntu, Debian
Upstream
Released (5.3~rc8)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (4.15.0-1044.70)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-gke-4.15
Launchpad, Ubuntu, Debian
Upstream
Released (5.3~rc8)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (4.15.0-1044.46)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-gke-5.0
Launchpad, Ubuntu, Debian
Upstream
Released (5.3~rc8)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (5.0.0-1017.17~18.04.1)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-hwe
Launchpad, Ubuntu, Debian
Upstream
Released (5.3~rc8)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (5.0.0-29.31~18.04.1)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (4.15.0-64.73~16.04.1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-hwe-edge
Launchpad, Ubuntu, Debian
Upstream
Released (5.3~rc8)
Ubuntu 18.04 LTS (Bionic Beaver) Ignored
(was pending \[5.3.0-19.20~18.04.2\] now end-of-life)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (4.15.0-64.73~16.04.1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-kvm
Launchpad, Ubuntu, Debian
Upstream
Released (5.3~rc8)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (4.15.0-1046.46)
Ubuntu 16.04 ESM (Xenial Xerus) Not vulnerable
(4.4.0-1004.9)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-lts-trusty
Launchpad, Ubuntu, Debian
Upstream
Released (5.3~rc8)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-lts-xenial
Launchpad, Ubuntu, Debian
Upstream
Released (5.3~rc8)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Not vulnerable
(4.4.0-13.29~14.04.1)
linux-oem
Launchpad, Ubuntu, Debian
Upstream
Released (5.3~rc8)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (4.15.0-1056.65)
Ubuntu 16.04 ESM (Xenial Xerus) Ignored
(was needs-triage now end-of-life)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-oem-5.4
Launchpad, Ubuntu, Debian
Upstream
Released (5.3~rc8)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-oem-osp1
Launchpad, Ubuntu, Debian
Upstream
Released (5.3~rc8)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (5.0.0-1022.24)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-oracle
Launchpad, Ubuntu, Debian
Upstream
Released (5.3~rc8)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (4.15.0-1025.28)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (4.15.0-1025.28~16.04.1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-oracle-5.0
Launchpad, Ubuntu, Debian
Upstream
Released (5.3~rc8)
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(5.0.0-1007.12~18.04.1)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian
Upstream
Released (5.3~rc8)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (4.15.0-1047.51)
Ubuntu 16.04 ESM (Xenial Xerus) Not vulnerable
(4.2.0-1013.19)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-raspi2-5.3
Launchpad, Ubuntu, Debian
Upstream
Released (5.3~rc8)
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(5.3.0-1017.19~18.04.1)
Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-snapdragon
Launchpad, Ubuntu, Debian
Upstream
Released (5.3~rc8)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (4.15.0-1064.71)
Ubuntu 16.04 ESM (Xenial Xerus) Not vulnerable
(4.4.0-1012.12)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist