Information disclosure in Linux kernel

Published: 2020-04-27 | Updated: 2021-04-28
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-28588
Exploitation vector Local
Public exploit N/A
Vulnerable software
Linux kernel
Operating systems & Components / Operating system

Vendor Linux Foundation

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Incorrect Conversion between Numeric Types

EUVDB-ID: #VU52687

Risk: Low

CVSSv3.1: 3.5 [CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-28588

CWE-ID: CWE-681 - Incorrect Conversion between Numeric Types

Exploit availability: No


The vulnerability allows a local attacker to gain unauthorized access to sensitive information on the system.

The vulnerability exists due to incorrect conversion between numeric types in the /proc/pid/syscall functionality. A local attacker can read /proc/pid/syscall to trigger this vulnerability, leading to the kernel leaking memory contents.


Install updates from vendor's website.

Vulnerable software versions

Linux kernel: 5.1 rc4 - 5.10 rc4

External links

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.