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Fencer Vulns
high 7.8

CVE-2020-14351 json

A flaw was found in the Linux kernel.

published 2020-12-03 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-6495

cvss
7.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 23%
public exploits
0
none known

Summary

A flaw was found in the Linux kernel. A use-after-free memory flaw was found in the perf subsystem allowing a local attacker with permission to monitor perf events to corrupt memory and possibly escalate privileges. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Patch / fix

  • linux linux_kernel 5.8.17
  • linux Debian 14, Debian 13, Debian 12 5.9.6-1

debian advisories DEBIAN-CVE-2020-14351

  • linux Ubuntu 16.04 LTS 4.4.0-197.229
  • linux Ubuntu 18.04 LTS 4.15.0-126.129
  • linux Ubuntu 20.04 LTS 5.4.0-56.62
  • linux-aws Ubuntu 16.04 LTS 4.4.0-1118.132
  • linux-aws Ubuntu 18.04 LTS 4.15.0-1088.93
  • linux-aws Ubuntu 20.04 LTS 5.4.0-1030.31
  • linux-gcp Ubuntu 16.04 LTS 4.15.0-1088.101~16.04.1
  • linux-gcp Ubuntu 20.04 LTS 5.4.0-1030.32

ubuntu advisories UBUNTU-CVE-2020-14351

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 7 3.10.0-1160.21.1.el7
  • perf RHEL 7 3.10.0-1160.21.1.el7
  • bpftool RHEL 7 3.10.0-1160.21.1.el7
  • python-perf RHEL 7 3.10.0-1160.21.1.el7
  • kernel-kdump RHEL 7 3.10.0-1160.21.1.el7
  • kernel-tools RHEL 7 3.10.0-1160.21.1.el7
  • kernel-tools-libs RHEL 7 3.10.0-1160.21.1.el7
  • kernel-bootwrapper RHEL 7 3.10.0-1160.21.1.el7

red hat advisories RHSA-2021:0765RHSA-2021:0774RHSA-2021:0686RHSA-2021:0856RHSA-2021:0857RHSA-2021:1028

  • 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-2020:3544-1SUSE-SU-2020:3532-1SUSE-SU-2020:3522-1SUSE-SU-2020:3513-1SUSE-SU-2020:3512-1SUSE-SU-2020:3503-1

  • kernel-rt openSUSE Leap 15.2 5.3.18-lp152.3.5.1
  • kernel-syms-rt openSUSE Leap 15.2 5.3.18-lp152.3.5.1
  • kernel-rt_debug openSUSE Leap 15.2 5.3.18-lp152.3.5.1
  • kernel-source-rt openSUSE Leap 15.2 5.3.18-lp152.3.5.1
  • kernel-default-base openSUSE Leap 15.2 5.3.18-lp152.50.1.lp152.8.10.1
  • kernel-syms openSUSE Leap 15.2 5.3.18-lp152.50.1
  • kernel-obs-qa openSUSE Leap 15.2 5.3.18-lp152.50.1
  • kernel-source openSUSE Leap 15.2 5.3.18-lp152.50.1

opensuse advisories openSUSE-SU-2021:0242-1openSUSE-SU-2020:2112-1openSUSE-SU-2020:1906-1

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-2020-14351 updated cvss 7.0

kernel: performance counters race condition use-after-free

  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 perf, kernel, kernel-alt, python-perf, kernel-kdump, kernel-tools, +3 more
    affected: workaround, no fix available
  • Red Hat Enterprise MRG 2 kernel-rt, mrg-rt-release, kernel-rt-trace, kernel-rt-vanilla, kernel-rt-firmware
    affected: workaround, no fix planned “Will not fix”
  • Red Hat CodeReady Linux Builder (v. 8) kernel-debuginfo-common-x86_64 4.18.0-240.15.1.el8_3, kernel-debuginfo-common-aarch64 4.18.0-240.15.1.el8_3, kernel-debuginfo-common-ppc64le 4.18.0-240.15.1.el8_3
    fixed: vendor fix RHSA-2021:0558
  • Red Hat CodeReady Linux Builder EUS (v. 8.1) kernel-debuginfo-common-x86_64 4.18.0-147.43.1.el8_1, kernel-debuginfo-common-aarch64 4.18.0-147.43.1.el8_1, kernel-debuginfo-common-ppc64le 4.18.0-147.43.1.el8_1
    fixed: vendor fix RHSA-2021:0686
  • Red Hat CodeReady Linux Builder EUS (v. 8.2) kernel-debuginfo-common-x86_64 4.18.0-193.46.1.el8_2, kernel-debuginfo-common-aarch64 4.18.0-193.46.1.el8_2, kernel-debuginfo-common-ppc64le 4.18.0-193.46.1.el8_2
    fixed: vendor fix RHSA-2021:0765
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-240.15.1.el8_3, kernel 4.18.0-240.15.1.el8_3, bpftool 4.18.0-240.15.1.el8_3, kernel-core 4.18.0-240.15.1.el8_3, kernel-tools 4.18.0-240.15.1.el8_3, python3-perf 4.18.0-240.15.1.el8_3, +15 more
    fixed: vendor fix RHSA-2021:0558
  • Red Hat Enterprise Linux BaseOS EUS (v. 8.1) kernel 4.18.0-147.43.1.el8_1, kernel-core 4.18.0-147.43.1.el8_1, kernel-modules 4.18.0-147.43.1.el8_1, kernel-zfcpdump 4.18.0-147.43.1.el8_1, kernel-debug-core 4.18.0-147.43.1.el8_1, kernel-debug-modules 4.18.0-147.43.1.el8_1, +9 more
    fixed: vendor fix RHSA-2021:0686
show 25 more
  • Red Hat Enterprise Linux BaseOS EUS (v. 8.2) perf 4.18.0-193.46.1.el8_2, kernel 4.18.0-193.46.1.el8_2, bpftool 4.18.0-193.46.1.el8_2, kernel-core 4.18.0-193.46.1.el8_2, kernel-tools 4.18.0-193.46.1.el8_2, python3-perf 4.18.0-193.46.1.el8_2, +15 more
    fixed: vendor fix RHSA-2021:0765
  • Red Hat Enterprise Linux Client (v. 7) perf 3.10.0-1160.21.1.el7, kernel 3.10.0-1160.21.1.el7, bpftool 3.10.0-1160.21.1.el7, python-perf 3.10.0-1160.21.1.el7, kernel-tools 3.10.0-1160.21.1.el7, kernel-tools-libs 3.10.0-1160.21.1.el7, +2 more Red Hat Enterprise Linux Client Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1160.21.1.el7
    fixed: vendor fix RHSA-2021:0856
  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.6) perf 3.10.0-957.70.1.el7, kernel 3.10.0-957.70.1.el7, bpftool 3.10.0-957.70.1.el7, python-perf 3.10.0-957.70.1.el7, kernel-tools 3.10.0-957.70.1.el7, kernel-tools-libs 3.10.0-957.70.1.el7, +2 more
    fixed: vendor fix RHSA-2021:0878
  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.7) perf 3.10.0-1062.46.1.el7, kernel 3.10.0-1062.46.1.el7, bpftool 3.10.0-1062.46.1.el7, python-perf 3.10.0-1062.46.1.el7, kernel-tools 3.10.0-1062.46.1.el7, kernel-tools-libs 3.10.0-1062.46.1.el7, +2 more
    fixed: vendor fix RHSA-2021:1028
  • Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1160.21.1.el7
    fixed: vendor fix RHSA-2021:0856
  • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6) kernel-debuginfo-common-x86_64 3.10.0-957.70.1.el7
    fixed: vendor fix RHSA-2021:0878
  • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7) kernel-debuginfo-common-x86_64 3.10.0-1062.46.1.el7
    fixed: vendor fix RHSA-2021:1028
  • Red Hat Enterprise Linux for Real Time (v. 7) kernel-rt 3.10.0-1160.21.1.rt56.1158.el7, kernel-rt-trace 3.10.0-1160.21.1.rt56.1158.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1160.21.1.rt56.1158.el7 Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt 3.10.0-1160.21.1.rt56.1158.el7, kernel-rt-kvm 3.10.0-1160.21.1.rt56.1158.el7, kernel-rt-trace 3.10.0-1160.21.1.rt56.1158.el7, kernel-rt-debug-kvm 3.10.0-1160.21.1.rt56.1158.el7, kernel-rt-trace-kvm 3.10.0-1160.21.1.rt56.1158.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1160.21.1.rt56.1158.el7
    fixed: vendor fix RHSA-2021:0857
  • Red Hat Enterprise Linux Real Time (v. 8) kernel-rt 4.18.0-240.15.1.rt7.69.el8_3, kernel-rt-core 4.18.0-240.15.1.rt7.69.el8_3, kernel-rt-modules 4.18.0-240.15.1.rt7.69.el8_3, kernel-rt-debug-core 4.18.0-240.15.1.rt7.69.el8_3, kernel-rt-debug-modules 4.18.0-240.15.1.rt7.69.el8_3, kernel-rt-modules-extra 4.18.0-240.15.1.rt7.69.el8_3, +2 more
    fixed: vendor fix RHSA-2021:0537
  • Red Hat Enterprise Linux Real Time EUS (v. 8.2) kernel-rt 4.18.0-193.46.1.rt13.96.el8_2, kernel-rt-core 4.18.0-193.46.1.rt13.96.el8_2, kernel-rt-modules 4.18.0-193.46.1.rt13.96.el8_2, kernel-rt-debug-core 4.18.0-193.46.1.rt13.96.el8_2, kernel-rt-debug-modules 4.18.0-193.46.1.rt13.96.el8_2, kernel-rt-modules-extra 4.18.0-193.46.1.rt13.96.el8_2, +2 more
    fixed: vendor fix RHSA-2021:0774
  • Red Hat Enterprise Linux Real Time for NFV (v. 8) kernel-rt 4.18.0-240.15.1.rt7.69.el8_3, kernel-rt-kvm 4.18.0-240.15.1.rt7.69.el8_3, kernel-rt-core 4.18.0-240.15.1.rt7.69.el8_3, kernel-rt-modules 4.18.0-240.15.1.rt7.69.el8_3, kernel-rt-debug-kvm 4.18.0-240.15.1.rt7.69.el8_3, kernel-rt-debug-core 4.18.0-240.15.1.rt7.69.el8_3, +4 more
    fixed: vendor fix RHSA-2021:0537
  • Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2) kernel-rt 4.18.0-193.46.1.rt13.96.el8_2, kernel-rt-kvm 4.18.0-193.46.1.rt13.96.el8_2, kernel-rt-core 4.18.0-193.46.1.rt13.96.el8_2, kernel-rt-modules 4.18.0-193.46.1.rt13.96.el8_2, kernel-rt-debug-kvm 4.18.0-193.46.1.rt13.96.el8_2, kernel-rt-debug-core 4.18.0-193.46.1.rt13.96.el8_2, +4 more
    fixed: vendor fix RHSA-2021:0774
  • Red Hat Enterprise Linux Server (v. 7) perf 3.10.0-1160.21.1.el7, kernel 3.10.0-1160.21.1.el7, bpftool 3.10.0-1160.21.1.el7, python-perf 3.10.0-1160.21.1.el7, kernel-kdump 3.10.0-1160.21.1.el7, kernel-tools 3.10.0-1160.21.1.el7, +7 more
    fixed: vendor fix RHSA-2021:0856
  • Red Hat Enterprise Linux Server AUS (v. 7.3) perf 3.10.0-514.86.1.el7, kernel 3.10.0-514.86.1.el7, python-perf 3.10.0-514.86.1.el7, kernel-tools 3.10.0-514.86.1.el7, kernel-tools-libs 3.10.0-514.86.1.el7, kernel-abi-whitelists 3.10.0-514.86.1.el7, +1 more
    fixed: vendor fix RHSA-2021:0848
  • Red Hat Enterprise Linux Server AUS (v. 7.4) perf 3.10.0-693.84.1.el7, kernel 3.10.0-693.84.1.el7, python-perf 3.10.0-693.84.1.el7, kernel-tools 3.10.0-693.84.1.el7, kernel-tools-libs 3.10.0-693.84.1.el7, kernel-abi-whitelists 3.10.0-693.84.1.el7, +1 more Red Hat Enterprise Linux Server E4S (v. 7.4) perf 3.10.0-693.84.1.el7, kernel 3.10.0-693.84.1.el7, python-perf 3.10.0-693.84.1.el7, kernel-tools 3.10.0-693.84.1.el7, kernel-tools-libs 3.10.0-693.84.1.el7, kernel-bootwrapper 3.10.0-693.84.1.el7, +3 more
    fixed: vendor fix RHSA-2021:1267
  • Red Hat Enterprise Linux Server EUS (v. 7.6) perf 3.10.0-957.70.1.el7, kernel 3.10.0-957.70.1.el7, bpftool 3.10.0-957.70.1.el7, python-perf 3.10.0-957.70.1.el7, kernel-kdump 3.10.0-957.70.1.el7, kernel-tools 3.10.0-957.70.1.el7, +7 more
    fixed: vendor fix RHSA-2021:0878
  • Red Hat Enterprise Linux Server EUS (v. 7.7) perf 3.10.0-1062.46.1.el7, kernel 3.10.0-1062.46.1.el7, bpftool 3.10.0-1062.46.1.el7, python-perf 3.10.0-1062.46.1.el7, kernel-kdump 3.10.0-1062.46.1.el7, kernel-tools 3.10.0-1062.46.1.el7, +7 more
    fixed: vendor fix RHSA-2021:1028
  • Red Hat Enterprise Linux Server Optional (v. 7) kernel-debuginfo-common-ppc64 3.10.0-1160.21.1.el7, kernel-debuginfo-common-x86_64 3.10.0-1160.21.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-1160.21.1.el7
    fixed: vendor fix RHSA-2021:0856
  • Red Hat Enterprise Linux Server Optional AUS (v. 7.3) kernel-debuginfo-common-x86_64 3.10.0-514.86.1.el7
    fixed: vendor fix RHSA-2021:0848
  • Red Hat Enterprise Linux Server Optional AUS (v. 7.4) kernel-debuginfo-common-x86_64 3.10.0-693.84.1.el7 Red Hat Enterprise Linux Server Optional E4S (v. 7.4) kernel-debuginfo-common-x86_64 3.10.0-693.84.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-693.84.1.el7
    fixed: vendor fix RHSA-2021:1267
  • Red Hat Enterprise Linux Server Optional EUS (v. 7.6) kernel-debuginfo-common-ppc64 3.10.0-957.70.1.el7, kernel-debuginfo-common-x86_64 3.10.0-957.70.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-957.70.1.el7
    fixed: vendor fix RHSA-2021:0878
  • Red Hat Enterprise Linux Server Optional EUS (v. 7.7) kernel-debuginfo-common-ppc64 3.10.0-1062.46.1.el7, kernel-debuginfo-common-x86_64 3.10.0-1062.46.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-1062.46.1.el7
    fixed: vendor fix RHSA-2021:1028
  • Red Hat Enterprise Linux Server Optional TUS (v. 7.4) kernel-debuginfo-common-x86_64 3.10.0-693.84.1.el7 Red Hat Enterprise Linux Server TUS (v. 7.4) perf 3.10.0-693.84.1.el7, kernel 3.10.0-693.84.1.el7, python-perf 3.10.0-693.84.1.el7, kernel-tools 3.10.0-693.84.1.el7, kernel-tools-libs 3.10.0-693.84.1.el7, kernel-abi-whitelists 3.10.0-693.84.1.el7, +1 more
    fixed: vendor fix RHSA-2021:1267
  • Red Hat Enterprise Linux Workstation (v. 7) perf 3.10.0-1160.21.1.el7, kernel 3.10.0-1160.21.1.el7, bpftool 3.10.0-1160.21.1.el7, python-perf 3.10.0-1160.21.1.el7, kernel-tools 3.10.0-1160.21.1.el7, kernel-tools-libs 3.10.0-1160.21.1.el7, +2 more Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1160.21.1.el7
    fixed: vendor fix RHSA-2021:0856
  • Red Hat Virtualization 4.2 Hypervisor for RHEL 7.6 EUS perf 3.10.0-957.70.1.el7, python-perf 3.10.0-957.70.1.el7
    fixed: vendor fix RHSA-2021:0878

3 more not affected in the full advisory

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

0.31% chance of exploitation in the next 30 days, higher than 23% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 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
Technology feeds

References

Sources

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.