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CVE-2018-16884

Public on 2018-12-18
Modified on 2019-01-25
Description

A flaw was found in the Linux kernel's NFS41+ subsystem. NFS41+ shares mounted in different network namespaces at the same time can make bc_svc_process() use wrong back-channel IDs and cause a use-after-free vulnerability. Thus a malicious container user can cause a host kernel memory corruption and a system panic. Due to the nature of the flaw, privilege escalation cannot be fully ruled out.

Severity
Important
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CVSS v3 Base Score
6.5
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Affected Packages

Platform Package Release Date Advisory
Amazon Linux 1 kernel 2019-01-25 02:26 ALAS-2019-1149
Amazon Linux 2 - Core kernel 2019-01-23 23:20 ALAS2-2019-1149

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 6.5 CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:H
NVD CVSSv2 6.7 AV:A/AC:L/Au:S/C:P/I:P/A:C
NVD CVSSv3 8.0 CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H