CVE-2018-16884 json
A flaw was found in the Linux kernel's NFS41+ subsystem.
published 2018-12-18 7 y ago modified 2026-06-17 4 mo ago also EUVD-2018-8674
- cvss
- 6.5
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.5%
- EPSS 1.5% chance of exploitation in 30 days, percentile 73%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- linux linux_kernel 3.16.65, 3.18.133, 4.4.171, 4.9.151, 4.14.94, 4.19.16, 4.20.3
- linux Debian 14, Debian 13, Debian 12 4.19.16-1
debian advisories DEBIAN-CVE-2018-16884
- linux Ubuntu 16.04 LTS 4.4.0-145.171
- linux Ubuntu 18.04 LTS 4.15.0-50.54
- linux-aws Ubuntu 14.04 LTS 4.4.0-1040.43
- linux-aws Ubuntu 16.04 LTS 4.4.0-1079.89
- linux-aws Ubuntu 18.04 LTS 4.15.0-1039.41
- linux-gcp Ubuntu 16.04 LTS 4.15.0-1032.34~16.04.1
- linux-gcp Ubuntu 18.04 LTS 4.15.0-1032.34
- linux-hwe Ubuntu 16.04 LTS 4.15.0-50.54~16.04.1
ubuntu advisories UBUNTU-CVE-2018-16884
Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
- kernel-alt RHEL 7 4.14.0-115.26.1.el7a
- perf RHEL 7 4.14.0-115.26.1.el7a
- kernel RHEL 7 4.14.0-115.26.1.el7a
- python-perf RHEL 7 4.14.0-115.26.1.el7a
- kernel-tools RHEL 7 4.14.0-115.26.1.el7a
- kernel-tools-libs RHEL 7 4.14.0-115.26.1.el7a
- kernel-bootwrapper RHEL 7 4.14.0-115.26.1.el7a
- kernel-abi-whitelists RHEL 7 4.14.0-115.26.1.el7a
red hat advisories RHSA-2020:2854RHSA-2019:3517RHSA-2019:3309RHSA-2020:0204RHSA-2019:2730RHSA-2019:2696
- kernel-ec2 SLE Module for Public Cloud 12 3.12.74-60.64.110.1
- kernel-syms SLES for SAP 12 SP3, SLES 12 SP3, SLED 12 SP3 4.4.175-94.79.1
- kernel-source SLES for SAP 12 SP3, SLES 12 SP3, SLED 12 SP3 4.4.175-94.79.1
- kernel-default SLES for SAP 12 SP3, SLES 12 SP3, SLED 12 SP3 +2 more 4.4.175-94.79.1
- kernel-obs-build SLE Software Development Kit 12 SP3 4.4.175-94.79.1
- kernel-syms SLES for SAP 12 SP2, SLES 12 SP2-LTSS, SLES 12 SP2-BCL +2 more 4.4.121-92.101.1
- kernel-source SLES for SAP 12 SP2, SLES 12 SP2-LTSS, SLES 12 SP2-BCL +2 more 4.4.121-92.101.1
- kernel-default SLES for SAP 12 SP2, SLES 12 SP2-LTSS, SLES 12 SP2-BCL +3 more 4.4.121-92.101.1
suse advisories SUSE-SU-2019:1289-1SUSE-SU-2019:0541-1SUSE-SU-2019:0439-1SUSE-SU-2019:0356-1SUSE-SU-2019:0326-1SUSE-SU-2019:0320-1
- kernel-source openSUSE Leap 15.0 4.12.14-lp150.12.45.1
opensuse advisories openSUSE-SU-2019:0065-1
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2018-16884 updated cvss 6.5
kernel: nfs: use-after-free in svc_process_common()
-
Red Hat CodeReady Linux Builder (v. 8) kernel-debuginfo-common-x86_64 4.18.0-147.el8, kernel-debuginfo-common-aarch64 4.18.0-147.el8, kernel-debuginfo-common-ppc64le 4.18.0-147.el8 Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-147.el8, kernel 4.18.0-147.el8, bpftool 4.18.0-147.el8, kernel-core 4.18.0-147.el8, kernel-tools 4.18.0-147.el8, python3-perf 4.18.0-147.el8, +15 morefixed: vendor fix RHSA-2019:3517
-
Red Hat Enterprise Linux BaseOS E4S (v. 8.0) perf 4.18.0-80.15.1.el8_0, kernel 4.18.0-80.15.1.el8_0, bpftool 4.18.0-80.15.1.el8_0, kernel-core 4.18.0-80.15.1.el8_0, kernel-tools 4.18.0-80.15.1.el8_0, python3-perf 4.18.0-80.15.1.el8_0, +9 morefixed: vendor fix RHSA-2020:0204
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Red Hat Enterprise Linux Client (v. 7) perf 3.10.0-957.27.2.el7, kernel 3.10.0-957.27.2.el7, bpftool 3.10.0-957.27.2.el7, python-perf 3.10.0-957.27.2.el7, kernel-tools 3.10.0-957.27.2.el7, kernel-tools-libs 3.10.0-957.27.2.el7, +2 more Red Hat Enterprise Linux Client Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-957.27.2.el7 Red Hat Enterprise Linux ComputeNode (v. 7) perf 3.10.0-957.27.2.el7, kernel 3.10.0-957.27.2.el7, bpftool 3.10.0-957.27.2.el7, python-perf 3.10.0-957.27.2.el7, kernel-tools 3.10.0-957.27.2.el7, kernel-tools-libs 3.10.0-957.27.2.el7, +2 morefixed: vendor fix RHSA-2019:1873
-
Red Hat Enterprise Linux ComputeNode EUS (v. 7.4) perf 3.10.0-693.58.1.el7, kernel 3.10.0-693.58.1.el7, python-perf 3.10.0-693.58.1.el7, kernel-tools 3.10.0-693.58.1.el7, kernel-tools-libs 3.10.0-693.58.1.el7, kernel-abi-whitelists 3.10.0-693.58.1.el7, +1 morefixed: vendor fix RHSA-2019:2696
-
Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-957.27.2.el7fixed: vendor fix RHSA-2019:1873
-
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.4) kernel-debuginfo-common-x86_64 3.10.0-693.58.1.el7fixed: vendor fix RHSA-2019:2696
-
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) perf 4.14.0-115.26.1.el7a, kernel 4.14.0-115.26.1.el7a, kernel-alt 4.14.0-115.26.1.el7a, python-perf 4.14.0-115.26.1.el7a, kernel-tools 4.14.0-115.26.1.el7a, kernel-tools-libs 4.14.0-115.26.1.el7a, +3 more Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) kernel-debuginfo-common-ppc64le 4.14.0-115.26.1.el7afixed: vendor fix RHSA-2020:2854
-
Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt 3.10.0-957.27.2.rt56.940.el7, kernel-rt-kvm 3.10.0-957.27.2.rt56.940.el7, kernel-rt-trace 3.10.0-957.27.2.rt56.940.el7, kernel-rt-debug-kvm 3.10.0-957.27.2.rt56.940.el7, kernel-rt-trace-kvm 3.10.0-957.27.2.rt56.940.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-957.27.2.rt56.940.el7fixed: vendor fix RHSA-2019:1891
show 9 moreshow fewer
-
Red Hat Enterprise Linux Real Time (v. 8) kernel-rt 4.18.0-147.rt24.93.el8, kernel-rt-core 4.18.0-147.rt24.93.el8, kernel-rt-modules 4.18.0-147.rt24.93.el8, kernel-rt-debug-core 4.18.0-147.rt24.93.el8, kernel-rt-debug-modules 4.18.0-147.rt24.93.el8, kernel-rt-modules-extra 4.18.0-147.rt24.93.el8, +2 more Red Hat Enterprise Linux Real Time for NFV (v. 8) kernel-rt 4.18.0-147.rt24.93.el8, kernel-rt-kvm 4.18.0-147.rt24.93.el8, kernel-rt-core 4.18.0-147.rt24.93.el8, kernel-rt-modules 4.18.0-147.rt24.93.el8, kernel-rt-debug-kvm 4.18.0-147.rt24.93.el8, kernel-rt-debug-core 4.18.0-147.rt24.93.el8, +4 morefixed: vendor fix RHSA-2019:3309
-
Red Hat Enterprise Linux Realtime (v. 7) kernel-rt 3.10.0-957.27.2.rt56.940.el7, kernel-rt-trace 3.10.0-957.27.2.rt56.940.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-957.27.2.rt56.940.el7fixed: vendor fix RHSA-2019:1891
-
Red Hat Enterprise Linux Server (v. 7) perf 3.10.0-957.27.2.el7, kernel 3.10.0-957.27.2.el7, bpftool 3.10.0-957.27.2.el7, python-perf 3.10.0-957.27.2.el7, kernel-kdump 3.10.0-957.27.2.el7, kernel-tools 3.10.0-957.27.2.el7, +7 morefixed: vendor fix RHSA-2019:1873
-
Red Hat Enterprise Linux Server EUS (v. 7.4) perf 3.10.0-693.58.1.el7, kernel 3.10.0-693.58.1.el7, python-perf 3.10.0-693.58.1.el7, kernel-kdump 3.10.0-693.58.1.el7, kernel-tools 3.10.0-693.58.1.el7, kernel-tools-libs 3.10.0-693.58.1.el7, +6 morefixed: vendor fix RHSA-2019:2696
-
Red Hat Enterprise Linux Server Optional (v. 7) kernel-debuginfo-common-ppc64 3.10.0-957.27.2.el7, kernel-debuginfo-common-x86_64 3.10.0-957.27.2.el7, kernel-debuginfo-common-ppc64le 3.10.0-957.27.2.el7fixed: vendor fix RHSA-2019:1873
-
Red Hat Enterprise Linux Server Optional EUS (v. 7.4) kernel-debuginfo-common-ppc64 3.10.0-693.58.1.el7, kernel-debuginfo-common-x86_64 3.10.0-693.58.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-693.58.1.el7fixed: vendor fix RHSA-2019:2696
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Red Hat Enterprise Linux Workstation (v. 7) perf 3.10.0-957.27.2.el7, kernel 3.10.0-957.27.2.el7, bpftool 3.10.0-957.27.2.el7, python-perf 3.10.0-957.27.2.el7, kernel-tools 3.10.0-957.27.2.el7, kernel-tools-libs 3.10.0-957.27.2.el7, +2 more Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-957.27.2.el7fixed: vendor fix RHSA-2019:1873
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Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt 3.10.0-693.58.1.rt56.652.el6rt, kernel-rt-trace 3.10.0-693.58.1.rt56.652.el6rt, kernel-rt-vanilla 3.10.0-693.58.1.rt56.652.el6rt, kernel-rt-firmware 3.10.0-693.58.1.rt56.652.el6rt, kernel-rt-debuginfo-common-x86_64 3.10.0-693.58.1.rt56.652.el6rtfixed: vendor fix RHSA-2019:2730
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Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) kernel-headers 4.14.0-115.26.1.el7anot affected: vulnerable code not present
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
Exploit prediction
1.46% chance of exploitation in the next 30 days, higher than 73% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 6.5 | CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:H |
| NVD | 3.1 | 8.0 | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.7 | AV:A/AC:L/Au:S/C:P/I:P/A:C |
Affected products
- [UNKNOWN] kernel:
Classification
- Weakness
-
- CWE-416 Use After Free
- Technology feeds
References
-
bugzilla.redhat.com
/show_bug.cgi?id=CVE-2018-16884
issue-tracking, patch, third-party-advisory
-
patchwork.kernel.org
/patch/10733769/
patch, vendor-advisory
-
patchwork.kernel.org
/cover/10733767/
patch, vendor-advisory
-
usn.ubuntu.com
/3932-1/
vendor-advisory, third-party-advisory
-
usn.ubuntu.com
/3932-2/
vendor-advisory, third-party-advisory
-
usn.ubuntu.com
/3981-1/
vendor-advisory, third-party-advisory
-
usn.ubuntu.com
/3980-1/
vendor-advisory, third-party-advisory
-
usn.ubuntu.com
/3980-2/
vendor-advisory, third-party-advisory
-
usn.ubuntu.com
/3981-2/
vendor-advisory, third-party-advisory
-
access.redhat.com
/errata/RHSA-2019:1873
vendor-advisory, third-party-advisory
-
access.redhat.com
/errata/RHSA-2019:1891
vendor-advisory, third-party-advisory
-
access.redhat.com
/errata/RHSA-2019:2696
vendor-advisory, third-party-advisory
-
access.redhat.com
/errata/RHSA-2019:2730
vendor-advisory, third-party-advisory
-
access.redhat.com
/errata/RHSA-2019:3309
vendor-advisory, third-party-advisory
-
access.redhat.com
/errata/RHSA-2019:3517
vendor-advisory, third-party-advisory
-
access.redhat.com
/errata/RHSA-2020:0204
vendor-advisory, third-party-advisory
-
securityfocus.com
/bid/106253
vdb-entry, third-party-advisory
-
lists.debian.org
/debian-lts-announce/2019/03/msg00034.html
mailing-list, third-party-advisory
-
lists.debian.org
/debian-lts-announce/2019/04/msg00004.html
mailing-list, third-party-advisory
-
lists.debian.org
/debian-lts-announce/2019/05/msg00002.html
mailing-list, third-party-advisory
-
oracle.com
/security-alerts/cpuApr2021.html
third-party-advisory
-
support.f5.com
/csp/article/K21430012
third-party-advisory
Sources
- CVE List CVE-2018-16884
- NVD CVE-2018-16884
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.