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.
Find out more about CVE-2018-10901 from the MITRE CVE dictionary dictionary and NIST NVD.
CVSS v3 metrics
| CVSS3 Base Score | 7.8 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| Attack Vector | Local |
| Attack Complexity | Low |
| Privileges Required | Low |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity Impact | High |
| Availability Impact | High |
Red Hat Security Errata
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat Enterprise Linux 6 (kernel) | RHSA-2018:2390 | 2018-08-14 |
| Red Hat Enterprise Linux Server TUS (v. 6.6) (kernel) | RHSA-2018:2392 | 2018-08-14 |
| Red Hat Enterprise Linux Advanced Update Support 6.6 (kernel) | RHSA-2018:2392 | 2018-08-14 |
| Red Hat Enterprise Linux Extended Update Support 6.7 (kernel) | RHSA-2018:2391 | 2018-08-14 |
| Red Hat Enterprise Linux Advanced Update Support 6.4 (kernel) | RHSA-2018:2394 | 2018-08-14 |
| Red Hat Enterprise Linux Advanced Update Support 6.5 (kernel) | RHSA-2018:2393 | 2018-08-14 |
Affected Packages State
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise MRG 2 | realtime-kernel | Not affected |
| Red Hat Enterprise Linux 7 | kernel-rt | Not affected |
| Red Hat Enterprise Linux 7 | kernel-alt | Not affected |
| Red Hat Enterprise Linux 7 | kernel | Not affected |
| Red Hat Enterprise Linux 5 | kernel | Not affected |
