Vulnerability identifier: #VU64876

Vulnerability risk: High

CVSSv3.1: 8.4 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2021-39793

CWE-ID: CWE-787

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Pixel
Mobile applications / Mobile firmware & hardware

Vendor:

Description

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

The vulnerability exists due to a boundary error within the kbase_jd_user_buf_pin_pages() function in mali_kbase_mem.c. A malicious application can trigger an out-of-bounds write and execute arbitrary code with elevated privileges.

Note, the vulnerability is being actively exploited in the wild.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

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External links
http://source.android.com/security/bulletin/pixel/2022-03-01

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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?

Yes. This vulnerability is being exploited in the wild.