Vulnerability identifier: #VU12296

Vulnerability risk: High

CVSSv3.1: 8.3 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-12188

CWE-ID: CWE-22

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description
The vulnerability allows an adjacent attacker to cause DoS condition or execute arbitrary code on the target system.

The weakness exists in arch/x86/kvm/mmu.c due to improper traversal of guest pagetable entries to resolve a guest virtual address when nested virtualisation is used. An adjacent attacker can cause the service to crash or execute arbitrary code.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation
Update to version 4.13.6.

Vulnerable software versions

Linux kernel: 4.13.4

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External links
http://patchwork.kernel.org/patch/9996579/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.