CVE-2019-20636 Memory corruption in n/a

What is CVE-2019-20636?

CVE-2019-20636 is a medium-severity memory corruption vulnerability in Linux kernel, published on 8 Apr 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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.

Weakness: CWE-787

Which versions are affected by CVE-2019-20636?

It affects 18 products.

Products include Linux kernel, Netapp Cloud Backup, Netapp Fas 8300, Netapp Fas 8700, Netapp Fas A400, Netapp Fas Baseboard Management Controller A220 and 12 more.

How do I fix CVE-2019-20636?

Apply the vendor's patch.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2019-20636 being exploited?

There is no known exploitation of CVE-2019-20636 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as A-153715664, ASB-A-153715664, DEBIAN-CVE-2019-20636, GHSA-rmm3-6hwr-c8q9, UBUNTU-CVE-2019-20636.