CVE-2018-16884

HIGH

CVSS Score

Published: December 18, 2018 at 10:00 PM UTC

Updated: June 17, 2026 at 01:44 AM UTC

5 products affected across 4 vendorsLinux KernelDebian LinuxUbuntu Linux

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Severity

HIGH8

Exploit prediction

EPSS 1%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Ubuntu Linux · Canonicalrubygems

95%

14.04 16.04

Debian Linux · Debiandrupal

95%

8.0

Linux Kernel · Linux

95%

3.17 ≤ v < 3.18.1333.19 ≤ v < 4.4.1713.7 ≤ v < 3.16.654.10 ≤ v < 4.14.944.15 ≤ v < 4.19.164.20 ≤ v < 4.20.34.5 ≤ v < 4.9.151

Affected range stops below 3.16.65, so it looks safe — our inference, not a vendor statement

Affected range stops below 3.18.133, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.14.94, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.19.16, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.20.3, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.4.171, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.9.151, so it looks safe — our inference, not a vendor statement

Enterprise Linux · Red Hatrpm

95%

7.0

Enterprise Mrg · Red Hat

95%

2.0

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references