Red Hat update for kernel

1) NULL pointer dereference

EUVDB-ID: #VU16179

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 - NULL Pointer Dereference

Exploit availability: No

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

Install update from vendor's website.

Vulnerable software versions

Red Hat Enterprise Linux for Power, little endian - Extended Update Support: 7.5

Red Hat Enterprise Linux for Power, big endian - Extended Update Support: 7.5

Red Hat Enterprise Linux for IBM z Systems - Extended Update Support: 7.5

Red Hat Enterprise Linux Server - Extended Update Support: 7.5

kernel (Red Hat package): 3.10.0-123.1.2.el7 - 3.10.0-862.20.2.el7

Red Hat Enterprise Linux EUS Compute Node: 7.5

:

External links

http://access.redhat.com/errata/RHSA-2018:3843

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.