Vulnerability identifier: #VU57372

Vulnerability risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-34866

CWE-ID: CWE-843

Exploitation vector: Local

Exploit availability: No

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

Vendor:

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a type confusion error within the handling of eBPF programs. A local user can run a specially crafted program on the system to trigger a type confusion and execute arbitrary code with kernel privileges.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

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External links
http://www.zerodayinitiative.com/advisories/ZDI-21-1148/

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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.