#VU72526 Use-after-free in Pixel - CVE-2022-20566

Vulnerability identifier: #VU72526

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-2022-20566

CWE-ID: CWE-416

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 use-after-free error within the l2cap_chan_put() function in Bluetooth L2CAP implementation. A local application can trigger a use-after-free error and execute arbitrary code with elevated privileges.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Pixel: before 2022-12-05

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External links
https://source.android.com/docs/security/bulletin/pixel/2022-12-01
https://android.googlesource.com/kernel/common/+/cacbff013baa586c63dd779e67d13238bf46c28e
https://android.googlesource.com/kernel/common/+/2f9fed9ce805cf4d97cffb2f59d57b41b8e7fca8

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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.