Linux kernel built with the KVM visualization support (CONFIG_KVM), with nested visualization (nVMX) feature enabled (nested=1), is vulnerable to a crash due to disabled external interrupts. As L2 guest could access (r/w) hardware CR8 register of the host(L0). In a nested visualization setup, L2 guest user could use this flaw to potentially crash the host(L0) resulting in DoS.
Find out more about CVE-2017-12154 from the MITRE CVE dictionary dictionary and NIST NVD.
This issue does not affect the versions of the kernel package as shipped with
Red Hat Enterprise Linux 5, 6, 7 and Red Hat Enterprise MRG 2.
Base Score | 4.3 |
---|---|
Base Metrics | AV:A/AC:H/Au:S/C:N/I:N/A:C |
Access Vector | Adjacent Network |
Access Complexity | High |
Authentication | Single |
Confidentiality Impact | None |
Integrity Impact | None |
Availability Impact | Complete |
CVSS3 Base Score | 5.8 |
---|---|
CVSS3 Base Metrics | CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H |
Attack Vector | Adjacent Network |
Attack Complexity | High |
Privileges Required | Low |
User Interaction | None |
Scope | Changed |
Confidentiality | None |
Integrity Impact | None |
Availability Impact | High |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
Platform | Errata | Release Date |
---|---|---|
Red Hat Enterprise Linux 7 (kernel) | RHSA-2018:1062 | 2018-04-10 |
Red Hat Enterprise Linux for Real Time for NFV (v. 7) (kernel-rt) | RHSA-2018:0676 | 2018-04-10 |
Platform | Package | State |
---|---|---|
Red Hat Enterprise MRG 2 | realtime-kernel | Not affected |
Red Hat Enterprise Linux 7 | kernel-alt | Not affected |
Red Hat Enterprise Linux 6 | kernel | Not affected |
Red Hat Enterprise Linux 5 | kernel | Not affected |