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Vulnerability record · CVE-2018-16884 · published 18 December 2018

CVE-2018-16884: Linux kernel use after free vulnerability

Linux · Linux Kernel

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.

8.0 CVSS 3.1 High EPSS 1.5% · top 27.6% CWE-416 · Use after free
8.0CVSS 3.1 base score, v2 6.7
1.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
5Affected product versions listed by NVD
44References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

5 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/106253 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2019:1873 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:1891 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2696 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2730 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:3309 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:3517 Third Party Advisory
https://access.redhat.com/errata/RHSA-2020:0204 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16884 Issue TrackingPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/05/msg00002.html Mailing ListThird Party Advisory
https://patchwork.kernel.org/cover/10733767/ PatchVendor Advisory
https://patchwork.kernel.org/patch/10733769/ PatchVendor Advisory
https://support.f5.com/csp/article/K21430012 Third Party Advisory
https://usn.ubuntu.com/3932-1/ Third Party Advisory
https://usn.ubuntu.com/3932-2/ Third Party Advisory
https://usn.ubuntu.com/3980-1/ Third Party Advisory
https://usn.ubuntu.com/3980-2/ Third Party Advisory
https://usn.ubuntu.com/3981-1/ Third Party Advisory
https://usn.ubuntu.com/3981-2/ Third Party Advisory
https://www.oracle.com/security-alerts/cpuApr2021.html Third Party Advisory
http://www.securityfocus.com/bid/106253 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2019:1873 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:1891 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2696 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2730 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:3309 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:3517 Third Party Advisory
https://access.redhat.com/errata/RHSA-2020:0204 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16884 Issue TrackingPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/05/msg00002.html Mailing ListThird Party Advisory
https://patchwork.kernel.org/cover/10733767/ PatchVendor Advisory
https://patchwork.kernel.org/patch/10733769/ PatchVendor Advisory
https://support.f5.com/csp/article/K21430012 Third Party Advisory
https://usn.ubuntu.com/3932-1/ Third Party Advisory
https://usn.ubuntu.com/3932-2/ Third Party Advisory
https://usn.ubuntu.com/3980-1/ Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2018-16884), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.