Vulnerability identifier: #VU11228

Vulnerability risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-8822

CWE-ID: CWE-119

Exploitation vector: Local

Exploit availability: No

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

Vendor: Linux Foundation

Description
The vulnerability allows a local attacker to gain elevated privileges on the target system.

The weakness exists in the ncp_read_kernel function due to incorrect buffer length handling. A local attacker can submit specially crafted data from a malicious NCPFS server, trigger memory corruption and execute arbitrary code with root privileges.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 4.10.0 - 4.10.15, 4.11 - 4.11.5, 4.12 - 4.12.9, 4.13 - 4.13.6, 4.14.0 - 4.14.15, 4.15 - 4.15.11, 4.16 - 4.16 rc6

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External links
http://www.mail-archive.com/netdev@vger.kernel.org/msg223373.html

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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.