Vulnerability identifier: #VU16179

Vulnerability risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-14646

CWE-ID: CWE-476

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 cause DoS condition on the target system.

The vulnerability exists due to NULL pointer dereference bug in the __netlink_ns_capable() function in the net/netlink/af_netlink.c file. A local attacker can trigger NULL pointer dereference when a net namespace with a netnsid is assigned to cause a kernel panic and a denial of service.

Mitigation
Update to version 4.15-rc8.

Vulnerable software versions

Linux kernel: 4.15 rc1 - 4.15 rc4, 4.14.0 - 4.14.84, 4.13 - 4.13.16, 4.12 - 4.12.14, 4.11 - 4.11.12, 4.10.0 - 4.10.17

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External links
http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f428fe4a04cc339166c8bb...

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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.