CVE-2019-15030

LOW

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 a Facility Unavailable exception. 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 of a missing arch/powerpc/kernel/process.c check.

References

http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00064.html

http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00066.html

http://www.openwall.com/lists/oss-security/2019/09/10/3

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8205d5d98ef7f155de211f5e2eb6ca03d95a5a60

https://usn.ubuntu.com/4135-2/

Details

Source: MITRE

Published: 2019-09-13

Updated: 2019-09-18

Type: CWE-20

Risk Information

CVSS v2.0

Base Score: 3.6

Vector: AV:L/AC:L/Au:N/C:P/I:N/A:P

Impact Score: 4.9

Exploitability Score: 3.9

Severity: LOW