Vulnerability in Linux Kernel
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.
Vulnerability class: Dirty Pipe (CVE-2022-0847)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (42.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 42.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Linux Kernel
- [Unknown] Kernel:
- Red Hat Enterprise Linux Desktop — versions 6.0
- Red Hat Enterprise Linux Server — versions 6.0
- Red Hat Enterprise Linux Server Aus — versions 6.4, 6.5, 6.6
- Red Hat Enterprise Linux Workstation — versions 6.0
Weakness classification (CWE)
References
- www.securityfocus.com/bid/104905 (VDB Entry, Third Party Advisory, vdb-entry)
- access.redhat.com/errata/RHSA-2018:2393 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:2390 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:2391 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:2392 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:2394 (vendor-advisory, Third Party Advisory)
- www.oracle.com/security-alerts/cpujul2020.html (Third Party Advisory)
- www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html (Patch, Third Party Advisory)
- help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+D… (Third Party Advisory)
- git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2018-10901?
- CVE-2018-10901 is a high-severity vulnerability in Linux Kernel, classified under Improper Initialization. CVSS score: 7.8/10. Published 2018-07-26.
- How severe is CVE-2018-10901?
- High severity. CVSS v3 base score is 7.8 out of 10.