Vulnerability identifier: #VU9655

Vulnerability risk: Low

CVSSv3.1: 5.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-1000407

CWE-ID: CWE-399

Exploitation vector: Local

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 attack.

The vulnerability exists due to the possibility of flooding the diagnostic port 0x80. A local user can trigger an exception and cause a kernel panic.

Mitigation
Update to version 4.14.6, 4.9.69 or 4.4.106.

Vulnerable software versions

Linux kernel: 4.14 - 4.14.5, 4.9 - 4.9.68, 4.4.0 - 4.4.110

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External links
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.6
http://www.openwall.com/lists/oss-security/2017/12/04/2
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.69
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.106

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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