Out-of-bounds write in Pixel - CVE-2021-39793
Published: July 4, 2022
Vulnerability identifier: #VU64876
CSH Severity: High
CVSS v4.0: 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:A/U:Amber
CVE-ID: CVE-2021-39793
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability:
The vulnerability is being exploited in the wild
Vendor: Google
Affected software:
Pixel
Pixel
Detailed vulnerability 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.
How to mitigate CVE-2021-39793
Install updates from vendor's website.