#VU65100 Double Free in Pixel - CVE-2021-39725

Vulnerability identifier: #VU65100

Vulnerability risk: Low

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-39725

CWE-ID: CWE-415

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Pixel
Mobile applications / Mobile firmware & hardware

Vendor: Google

Description

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

The vulnerability exists due to a boundary error in gasket_free_coherent_memory_all of gasket_page_table.c. A local application with system privileges can trigger double free error and escalate privileges on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Pixel: before 2022-03-05

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External links
https://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?

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