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Fencer Intel
medium 6.7

CVE-2019-20636 json

In the Linux kernel before 5.4.12, drivers/input/input.c has out-of-bounds writes via a crafted keycode table, as demonstrated by input_set…

published 6y ago modified 4mo ago also EUVD-2019-11175

cvss
6.7
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 34%
public exploits
0
none known

Summary

In the Linux kernel before 5.4.12, drivers/input/input.c has out-of-bounds writes via a crafted keycode table, as demonstrated by input_set_keycode, aka CID-cb222aed03d7.

Patch / fix

  • linux linux_kernel 3.16.83, 4.4.210, 4.9.210, 4.14.165, 4.19.96, 5.4.12
  • linux Debian 14, Debian 13, Debian 12 5.4.13-1

debian advisories DEBIAN-CVE-2019-20636

  • linux Ubuntu 16.04 LTS 4.4.0-174.204
  • linux Ubuntu 18.04 LTS 4.15.0-91.92
  • linux-aws Ubuntu 16.04 LTS 4.4.0-1102.113
  • linux-aws Ubuntu 18.04 LTS 4.15.0-1063.67
  • linux-gcp Ubuntu 16.04 LTS 4.15.0-1058.62
  • linux-hwe Ubuntu 16.04 LTS 4.15.0-91.92~16.04.1
  • linux-hwe Ubuntu 18.04 LTS 5.3.0-42.34~18.04.1
  • linux-kvm Ubuntu 16.04 LTS 4.4.0-1066.73

ubuntu advisories UBUNTU-CVE-2019-20636

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-2020:4431RHSA-2020:4060RHSA-2020:4609RHSA-2020:4062RHSA-2020:5656

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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-2019-20636 updated cvss 6.7

kernel: out-of-bounds write via crafted keycode table

  • 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 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.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 Client (v. 7) perf 3.10.0-1160.el7, kernel 3.10.0-1160.el7, bpftool 3.10.0-1160.el7, python-perf 3.10.0-1160.el7, kernel-tools 3.10.0-1160.el7, kernel-tools-libs 3.10.0-1160.el7, +2 more Red Hat Enterprise Linux Client Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1160.el7 Red Hat Enterprise Linux ComputeNode (v. 7) perf 3.10.0-1160.el7, kernel 3.10.0-1160.el7, bpftool 3.10.0-1160.el7, python-perf 3.10.0-1160.el7, kernel-tools 3.10.0-1160.el7, kernel-tools-libs 3.10.0-1160.el7, +2 more
    fixed: vendor fix RHSA-2020:4060
  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.6) perf 3.10.0-957.65.1.el7, kernel 3.10.0-957.65.1.el7, bpftool 3.10.0-957.65.1.el7, python-perf 3.10.0-957.65.1.el7, kernel-tools 3.10.0-957.65.1.el7, kernel-tools-libs 3.10.0-957.65.1.el7, +2 more
    fixed: vendor fix RHSA-2020:5656
  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.7) perf 3.10.0-1062.43.1.el7, kernel 3.10.0-1062.43.1.el7, bpftool 3.10.0-1062.43.1.el7, python-perf 3.10.0-1062.43.1.el7, kernel-tools 3.10.0-1062.43.1.el7, kernel-tools-libs 3.10.0-1062.43.1.el7, +2 more
    fixed: vendor fix RHSA-2021:0019
  • Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1160.el7
    fixed: vendor fix RHSA-2020:4060
  • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6) kernel-debuginfo-common-x86_64 3.10.0-957.65.1.el7
    fixed: vendor fix RHSA-2020:5656
show 16 more
  • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7) kernel-debuginfo-common-x86_64 3.10.0-1062.43.1.el7
    fixed: vendor fix RHSA-2021:0019
  • 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.el7a
    fixed: vendor fix RHSA-2020:2854
  • Red Hat Enterprise Linux for Real Time (v. 7) kernel-rt 3.10.0-1160.rt56.1131.el7, kernel-rt-trace 3.10.0-1160.rt56.1131.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1160.rt56.1131.el7 Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt 3.10.0-1160.rt56.1131.el7, kernel-rt-kvm 3.10.0-1160.rt56.1131.el7, kernel-rt-trace 3.10.0-1160.rt56.1131.el7, kernel-rt-debug-kvm 3.10.0-1160.rt56.1131.el7, kernel-rt-trace-kvm 3.10.0-1160.rt56.1131.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1160.rt56.1131.el7
    fixed: vendor fix RHSA-2020:4062
  • 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 Server (v. 7) perf 3.10.0-1160.el7, kernel 3.10.0-1160.el7, bpftool 3.10.0-1160.el7, python-perf 3.10.0-1160.el7, kernel-kdump 3.10.0-1160.el7, kernel-tools 3.10.0-1160.el7, +7 more
    fixed: vendor fix RHSA-2020:4060
  • Red Hat Enterprise Linux Server AUS (v. 7.4) perf 3.10.0-693.81.1.el7, kernel 3.10.0-693.81.1.el7, python-perf 3.10.0-693.81.1.el7, kernel-tools 3.10.0-693.81.1.el7, kernel-tools-libs 3.10.0-693.81.1.el7, kernel-abi-whitelists 3.10.0-693.81.1.el7, +1 more Red Hat Enterprise Linux Server E4S (v. 7.4) perf 3.10.0-693.81.1.el7, kernel 3.10.0-693.81.1.el7, python-perf 3.10.0-693.81.1.el7, kernel-tools 3.10.0-693.81.1.el7, kernel-tools-libs 3.10.0-693.81.1.el7, kernel-bootwrapper 3.10.0-693.81.1.el7, +3 more
    fixed: vendor fix RHSA-2020:5430
  • Red Hat Enterprise Linux Server EUS (v. 7.6) perf 3.10.0-957.65.1.el7, kernel 3.10.0-957.65.1.el7, bpftool 3.10.0-957.65.1.el7, python-perf 3.10.0-957.65.1.el7, kernel-kdump 3.10.0-957.65.1.el7, kernel-tools 3.10.0-957.65.1.el7, +7 more
    fixed: vendor fix RHSA-2020:5656
  • Red Hat Enterprise Linux Server EUS (v. 7.7) perf 3.10.0-1062.43.1.el7, kernel 3.10.0-1062.43.1.el7, bpftool 3.10.0-1062.43.1.el7, python-perf 3.10.0-1062.43.1.el7, kernel-kdump 3.10.0-1062.43.1.el7, kernel-tools 3.10.0-1062.43.1.el7, +7 more
    fixed: vendor fix RHSA-2021:0019
  • Red Hat Enterprise Linux Server Optional (v. 7) kernel-debuginfo-common-ppc64 3.10.0-1160.el7, kernel-debuginfo-common-x86_64 3.10.0-1160.el7, kernel-debuginfo-common-ppc64le 3.10.0-1160.el7
    fixed: vendor fix RHSA-2020:4060
  • Red Hat Enterprise Linux Server Optional AUS (v. 7.4) kernel-debuginfo-common-x86_64 3.10.0-693.81.1.el7 Red Hat Enterprise Linux Server Optional E4S (v. 7.4) kernel-debuginfo-common-x86_64 3.10.0-693.81.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-693.81.1.el7
    fixed: vendor fix RHSA-2020:5430
  • Red Hat Enterprise Linux Server Optional EUS (v. 7.6) kernel-debuginfo-common-ppc64 3.10.0-957.65.1.el7, kernel-debuginfo-common-x86_64 3.10.0-957.65.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-957.65.1.el7
    fixed: vendor fix RHSA-2020:5656
  • Red Hat Enterprise Linux Server Optional EUS (v. 7.7) kernel-debuginfo-common-ppc64 3.10.0-1062.43.1.el7, kernel-debuginfo-common-x86_64 3.10.0-1062.43.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-1062.43.1.el7
    fixed: vendor fix RHSA-2021:0019
  • Red Hat Enterprise Linux Server Optional TUS (v. 7.4) kernel-debuginfo-common-x86_64 3.10.0-693.81.1.el7 Red Hat Enterprise Linux Server TUS (v. 7.4) perf 3.10.0-693.81.1.el7, kernel 3.10.0-693.81.1.el7, python-perf 3.10.0-693.81.1.el7, kernel-tools 3.10.0-693.81.1.el7, kernel-tools-libs 3.10.0-693.81.1.el7, kernel-abi-whitelists 3.10.0-693.81.1.el7, +1 more
    fixed: vendor fix RHSA-2020:5430
  • Red Hat Enterprise Linux Workstation (v. 7) perf 3.10.0-1160.el7, kernel 3.10.0-1160.el7, bpftool 3.10.0-1160.el7, python-perf 3.10.0-1160.el7, kernel-tools 3.10.0-1160.el7, kernel-tools-libs 3.10.0-1160.el7, +2 more Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1160.el7
    fixed: vendor fix RHSA-2020:4060
  • Red Hat Virtualization 4.2 Hypervisor for RHEL 7.6 EUS perf 3.10.0-957.65.1.el7, python-perf 3.10.0-957.65.1.el7
    fixed: vendor fix RHSA-2020:5656
  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux ComputeNode EUS (v. 7.7) kernel-headers 3.10.0-1062.43.1.el7 Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) kernel-headers 4.14.0-115.26.1.el7a Red Hat Enterprise Linux Server AUS (v. 7.4) kernel-headers 3.10.0-693.81.1.el7 Red Hat Enterprise Linux Server E4S (v. 7.4) kernel-headers 3.10.0-693.81.1.el7 Red Hat Enterprise Linux Server EUS (v. 7.7) kernel-headers 3.10.0-1062.43.1.el7
    +1 more products
    Red Hat Enterprise Linux Server TUS (v. 7.4) kernel-headers 3.10.0-693.81.1.el7
    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

Exploit prediction

0.40% chance of exploitation in the next 30 days, higher than 34% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 6.7 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.2 AV:L/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness
Technology feeds

References

Sources

Fencer Intel 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.