#VU8695 Assertion failure in Linux kernel - CVE-2017-1000252

Vulnerability identifier: #VU8695

Vulnerability risk: Low

CVSSv4.0: 4.6 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-1000252

CWE-ID: CWE-617

Exploitation vector: Local network

Exploit availability: No

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

Vendor: Linux Foundation

Description
The vulnerability allows a local user to perform a denial of service (DoS) attack.

The KVM subsystem in the Linux kernel through 4.13.3 allows guest OS users to cause a denial of service (assertion failure, and hypervisor hang or crash) via an out-of bounds guest_irq value, related to arch/x86/kvm/vmx.c and virt/kvm/eventfd.c.

Mitigation
Install the latest version of Linux kernel 4.4.90, 4.13.5 or 4.9.53.

Vulnerable software versions

Linux kernel: 4.4 - 4.4.89, 4.9 - 4.9.54, 4.13 - 4.13.3

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External links
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.90
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.5
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.53

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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