Vulnerability identifier: #VU30312

Vulnerability risk: Low

CVSSv3.1: 5.8 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-20636

CWE-ID: CWE-787

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a local privileged user to execute arbitrary code.

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.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.4.1 - 5.4.11

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External links
http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.12
http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cb222aed03d798fc074be55e59d9a112338ee784
http://github.com/torvalds/linux/commit/cb222aed03d798fc074be55e59d9a112338ee784
http://lists.debian.org/debian-lts-announce/2020/06/msg00011.html
http://lists.debian.org/debian-lts-announce/2020/06/msg00013.html
http://security.netapp.com/advisory/ntap-20200430-0004/

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.