Auth bypass in Linux Kernel
CVE-2019-15030
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.
Vulnerability class: Broken Access Control
EPSS: 0.005 (36.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L.
Affected products
- Linux Linux_kernel
- Canonical Ubuntu_linux — versions 16.04, 18.04, 19.04
- Opensuse Leap — versions 15.0, 15.1
- Redhat Enterprise_linux — versions 7.0, 8.0
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (Exploit, Patch, Mailing List, x_refsource_MISC, Vendor Advisory)
- cve@mitre.org (Patch, Mailing List, Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (x_refsource_UBUNTU, vendor-advisory, Third Party Advisory)
- cve@mitre.org (vendor-advisory, Third Party Advisory, x_refsource_SUSE)
- cve@mitre.org (vendor-advisory, Third Party Advisory, x_refsource_SUSE)
- cve@mitre.org (x_refsource_UBUNTU, vendor-advisory, Third Party Advisory)
- cve@mitre.org (x_refsource_CONFIRM, Third Party Advisory)
- cve@mitre.org (x_refsource_REDHAT, vendor-advisory)
Frequently asked questions
- What is CVE-2019-15030?
- CVE-2019-15030 is a medium-severity vulnerability in Linux Kernel, classified under Missing Authorization. CVSS score: 4.4/10. Published 2019-09-13.
- How severe is CVE-2019-15030?
- Medium severity. CVSS v3 base score is 4.4 out of 10.