#VU56816 Unchecked Return Value in Linux kernel - CVE-2020-29569

Vulnerability identifier: #VU56816

Vulnerability risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-29569

CWE-ID: CWE-252

Exploitation vector: Local

Exploit availability: No

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

Vendor: Linux Foundation

Description

The vulnerability allows a local user to compromise the target system.

The vulnerability exists due to an unchecked return value. A local user can cause a denial of service (DoS) condition, leading to privilege escalation and information leaks.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Linux kernel: 4.14.0 rc1 - 4.14.222, 5.10 - 5.10.1

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External links
https://xenbits.xenproject.org/xsa/advisory-350.html
https://www.debian.org/security/2021/dsa-4843
https://security.netapp.com/advisory/ntap-20210205-0001/
https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html
https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html

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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.