CVE-2018-10901
A flaw was found in Linux kernel's KVM virtualization subsystem. The VMX code does not restore the GDT.LIMIT to the previous host value, but instead sets it to 64KB. With a corrupted GDT limit a host's userspace code has an ability to place malicious entries in the GDT, particularly to the per-cpu variables. An attacker can use this to escalate their privileges.
- Score
- CVSS 3.1 7.8 High
- Status
- Modified - secalert@redhat.com
- Published
- 2018-07-26
- Last modified
- 2024-08-05
- Weaknesses
- CWE-665
Affected products
- Linux Kernel (Linux)
- Enterprise Linux Desktop (Redhat)
- Enterprise Linux Server (Redhat)
- Enterprise Linux Server Aus (Redhat)
- Enterprise Linux Workstation (Redhat)
- Kernel (Unknown)
References
- http://www.securityfocus.com/bid/104905
- https://access.redhat.com/errata/RHSA-2018:2390
- https://access.redhat.com/errata/RHSA-2018:2391
- https://access.redhat.com/errata/RHSA-2018:2392
- https://access.redhat.com/errata/RHSA-2018:2393
- https://access.redhat.com/errata/RHSA-2018:2394
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10901
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3444d7da1839b851eefedd372978d8a982316c36
- https://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0
- https://www.oracle.com/security-alerts/cpujul2020.html
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
