CVE-2019-20636

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.

Published: 2020-04-08 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-20636 is rated Low Risk (37.6/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.38%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2019-20636

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.12% 0.38% +0.27%
2 2025-03-30 0.39% 0.12% -0.27%
3 2025-03-29 — 0.39% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-20636

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.7 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 0.8 5.9 [email protected]
7.2 2.0 HIGH
AV:L/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 3.9 10.0 [email protected]

Weakness enumeration for CVE-2019-20636

OS Trackers for CVE-2019-20636

vendor priority summary link
debian not yet assigned CVE-2019-20636 not yet assigned priority: Debian including 1 source packages (linux), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2019-20636
redhat medium — https://access.redhat.com/security/cve/CVE-2019-20636
suse medium CVE-2019-20636 severity moderate: SUSE including 52 source package names (bpftool-3.10.0-1160.el7, bpftool-4.18.0-240.el8, …), 121 product×package rows across 31 product lines (SUSE CaaS Platform 4.0, SUSE Enterprise Storage 5, … (31 product lines)): Known Not Affected 81, Fixed 40. https://www.suse.com/security/cve/CVE-2019-20636/
ubuntu medium CVE-2019-20636 medium priority: Ubuntu including 117 source packages (linux, linux-aws, …), 1251 status rows across 13 suites (bionic, eoan, focal, groovy, hirsute, jammy, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 902, not-affected 175, released 156, ignored 17, needed 1. https://ubuntu.com/security/CVE-2019-20636

Affected software / configurations for CVE-2019-20636

Vendor Product Version Raw CPE
linux linux_kernel < 3.16.83 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 3.17, < 4.4.210 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 4.5, < 4.9.210 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 4.10, < 4.14.165 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 4.15, < 4.19.96 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 4.20, < 5.4.12 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
netapp cloud_backup — cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*
netapp solidfire — cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:*
netapp steelstore_cloud_integrated_storage — cpe:2.3:a:netapp:steelstore_cloud_integrated_storage:-:*:*:*:*:*:*:*
netapp fas_8300 — cpe:2.3:h:netapp:fas_8300:-:*:*:*:*:*:*:*
netapp fas_8700 — cpe:2.3:h:netapp:fas_8700:-:*:*:*:*:*:*:*
netapp fas_a400 — cpe:2.3:h:netapp:fas_a400:-:*:*:*:*:*:*:*
netapp fas_baseboard_management_controller_a220 — cpe:2.3:h:netapp:fas_baseboard_management_controller_a220:-:*:*:*:*:*:*:*
netapp fas_baseboard_management_controller_a320 — cpe:2.3:h:netapp:fas_baseboard_management_controller_a320:-:*:*:*:*:*:*:*
netapp fas_baseboard_management_controller_a800 — cpe:2.3:h:netapp:fas_baseboard_management_controller_a800:-:*:*:*:*:*:*:*
netapp fas_baseboard_management_controller_c190 — cpe:2.3:h:netapp:fas_baseboard_management_controller_c190:-:*:*:*:*:*:*:*
netapp h300s — cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:*
netapp h410s — cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:*
netapp h500s — cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:*
netapp h610c — cpe:2.3:h:netapp:h610c:-:*:*:*:*:*:*:*
netapp h610s — cpe:2.3:h:netapp:h610s:-:*:*:*:*:*:*:*
netapp h615c — cpe:2.3:h:netapp:h615c:-:*:*:*:*:*:*:*
netapp h700s — cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:*

References for CVE-2019-20636

cvelogic Threat Intelligence