Improper Input Validation Affecting kernel-debug-core package, versions <0:4.18.0-147.8.1.el8_1
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Test your applications- Snyk ID SNYK-RHEL8-KERNELDEBUGCORE-3661770
- published 26 Jul 2021
- disclosed 6 Sep 2019
How to fix?
Upgrade RHEL:8 kernel-debug-core to version 0:4.18.0-147.8.1.el8_1 or higher.
This issue was patched in RHSA-2020:1372.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-debug-core package and not the kernel-debug-core package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
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
- https://security.netapp.com/advisory/ntap-20191004-0001/
- https://access.redhat.com/security/cve/CVE-2019-15030
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8205d5d98ef7f155de211f5e2eb6ca03d95a5a60
- http://www.openwall.com/lists/oss-security/2019/09/10/3
- https://access.redhat.com/errata/RHSA-2020:1372
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00064.html
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00066.html
- https://usn.ubuntu.com/4135-1/
- https://usn.ubuntu.com/4135-2/