Zero-day vulnerability in Google Android

Use-after-free
CVE-2021-1048

Vulnerability details

Advisory: SB2021110302 - Privilege escalation in Google Android

Vulnerable component: Google Android

CVE-ID: CVE-2021-1048

CVSSv3 score: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C

CWE-ID: CWE-416 - Use After Free

Description:

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

The vulnerability exists due to a use-after-free error in the Android kernel component within the epoll_loop_check_proc() function. A malicious application can trigger a use-after-free error and execute arbitrary code with kernel privileges.

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

External links:

https://source.android.com/security/bulletin/2021-11-01#2021-11-06-security-patch-level-vulnerability-details