high 7.8

CVE-2020-14381 json

A flaw was found in the Linux kernel’s futex implementation.

published 2020-12-03 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-6521

cvss: 7.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.8%; EPSS 0.8% chance of exploitation in 30 days, percentile 57%
public exploits: 0; none known

A flaw was found in the Linux kernel’s futex implementation. This flaw allows a local attacker to corrupt system memory or escalate their privileges when creating a futex on a filesystem that is about to be unmounted. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Patch / fix

fixed in 1 distros 5 links 2

linux linux_kernel 5.6

debian ubuntu red hat suse opensuse

linux Debian 14, Debian 13, Debian 12 5.5.13-1

debian advisories DEBIAN-CVE-2020-14381

linux Ubuntu 16.04 LTS 4.4.0-179.209
linux Ubuntu 18.04 LTS 4.15.0-99.100
linux-aws Ubuntu 16.04 LTS 4.4.0-1107.118
linux-aws Ubuntu 18.04 LTS 4.15.0-1066.70
linux-gcp Ubuntu 16.04 LTS 4.15.0-1061.65
linux-hwe Ubuntu 16.04 LTS 4.15.0-99.100~16.04.1
linux-hwe Ubuntu 18.04 LTS 5.3.0-53.47~18.04.1
linux-kvm Ubuntu 16.04 LTS 4.4.0-1071.78

ubuntu advisories UBUNTU-CVE-2020-14381

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 RHEL 8 4.18.0-240.el8
perf RHEL 8 4.18.0-240.el8
bpftool RHEL 8 4.18.0-240.el8
kernel-core RHEL 8 4.18.0-240.el8
kernel-tools RHEL 8 4.18.0-240.el8
python3-perf RHEL 8 4.18.0-240.el8
kernel-modules RHEL 8 4.18.0-240.el8
kernel-zfcpdump RHEL 8 4.18.0-240.el8

red hat advisories RHSA-2020:4431 RHSA-2020:4609

kernel-syms SLES for SAP 12 SP4, SLES 12 SP4-LTSS, OpenStack Cloud Crowbar 9 +1 more 4.12.14-95.65.1
kernel-source SLES for SAP 12 SP4, SLES 12 SP4-LTSS, OpenStack Cloud Crowbar 9 +1 more 4.12.14-95.65.1
kernel-default SLES for SAP 12 SP4, SLES 12 SP4-LTSS, SLE Live Patching 12 SP4 +3 more 4.12.14-95.65.1
kernel-syms SLES for SAP 15, SLES 15-LTSS, SLE High Performance Computing 15-LTSS +1 more 4.12.14-150.63.1
kernel-source SLES for SAP 15, SLES 15-LTSS, SLE High Performance Computing 15-LTSS +1 more 4.12.14-150.63.1
kernel-default SLES for SAP 15, SLES 15-LTSS, SLE Live Patching 15 +3 more 4.12.14-150.63.1
kernel-vanilla SLES for SAP 15, SLES 15-LTSS, SLE High Performance Computing 15-LTSS +1 more 4.12.14-150.63.1
kernel-obs-build SLES for SAP 15, SLES 15-LTSS, SLE High Performance Computing 15-LTSS +1 more 4.12.14-150.63.1

suse advisories SUSE-SU-2021:14630-1 SUSE-SU-2020:3544-1 SUSE-SU-2020:3532-1 SUSE-SU-2020:3503-1 SUSE-SU-2020:3501-1 SUSE-SU-2020:3210-1

kernel-syms openSUSE Leap 15.1 4.12.14-lp151.28.71.1
kernel-obs-qa openSUSE Leap 15.1 4.12.14-lp151.28.71.2
kernel-source openSUSE Leap 15.1 4.12.14-lp151.28.71.1
kernel-default openSUSE Leap 15.1 4.12.14-lp151.28.71.2
kernel-vanilla openSUSE Leap 15.1 4.12.14-lp151.28.71.2
kernel-kvmsmall openSUSE Leap 15.1 4.12.14-lp151.28.71.2
kernel-obs-build openSUSE Leap 15.1 4.12.14-lp151.28.71.2

opensuse advisories openSUSE-SU-2020:1655-1

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-2020-14381 updated 2026-11-06 cvss 6.7

kernel: referencing inode of removed superblock in get_futex_key() causes UAF

Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, kernel-alt, python-perf, +9 more
affected: workaround, no fix planned “Will not fix”
Red Hat Enterprise MRG 2 kernel-rt, mrg-rt-release, kernel-rt-trace, kernel-rt-vanilla, kernel-rt-firmware
affected: workaround, no fix planned “Out of support scope”
Red Hat CodeReady Linux Builder (v. 8) kernel-debuginfo-common-x86_64 4.18.0-240.el8, kernel-debuginfo-common-aarch64 4.18.0-240.el8, kernel-debuginfo-common-ppc64le 4.18.0-240.el8 Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-240.el8, kernel 4.18.0-240.el8, bpftool 4.18.0-240.el8, kernel-core 4.18.0-240.el8, kernel-tools 4.18.0-240.el8, python3-perf 4.18.0-240.el8, +15 more
fixed: vendor fix RHSA-2020:4431
Red Hat Enterprise Linux Real Time (v. 8) kernel-rt 4.18.0-240.rt7.54.el8, kernel-rt-core 4.18.0-240.rt7.54.el8, kernel-rt-modules 4.18.0-240.rt7.54.el8, kernel-rt-debug-core 4.18.0-240.rt7.54.el8, kernel-rt-debug-modules 4.18.0-240.rt7.54.el8, kernel-rt-modules-extra 4.18.0-240.rt7.54.el8, +2 more Red Hat Enterprise Linux Real Time for NFV (v. 8) kernel-rt 4.18.0-240.rt7.54.el8, kernel-rt-kvm 4.18.0-240.rt7.54.el8, kernel-rt-core 4.18.0-240.rt7.54.el8, kernel-rt-modules 4.18.0-240.rt7.54.el8, kernel-rt-debug-kvm 4.18.0-240.rt7.54.el8, kernel-rt-debug-core 4.18.0-240.rt7.54.el8, +4 more
fixed: vendor fix RHSA-2020:4609
Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more
not 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

cisa ICSA-24-074-07 updated 2024-03-14 cvss 7.8

Siemens SIMATIC

Siemens SIMATIC RF160B (6GT2003-0FA00) <V2.2
affected: mitigation “Siemens has released a new version (V2.2) for SIMATIC RF160B and recommends to update to the latest version.” siemens.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 15 mo ago (2025-07-24)

Exploit prediction

0.83% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	4.6	AV:L/AC:L/Au:N/C:P/I:P/A:P

Affected products

n/a kernel

Classification

Weakness

CWE-416 Use After Free

Technology feeds

Linux kernel rss critical rss

References

git.kernel.org /pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8019ad13ef7f64be44d4f892af9c840179009254
mailing-list, patch, vendor-advisory
bugzilla.redhat.com /show_bug.cgi?id=1874311
issue-tracking, patch, third-party-advisory

Sources

CVE List CVE-2020-14381
NVD CVE-2020-14381

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.

Summary