#VU67866 Out-of-bounds write in Google Android - CVE-2022-20422
Published: October 4, 2022
Vulnerability identifier: #VU67866
Vulnerability risk: Low
CVSSv4.0: 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:U/U:Clear
CVE-ID: CVE-2022-20422
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Google Android
Google Android
Software vendor:
Google
Description
The vulnerability allows a local application to escalate privileges on the system.
The vulnerability exists due to a boundary error within emulation_proc_handler() in armv8 emulation in arch/arm64/kernel/armv8_deprecated.c. A local user can trigger an out-of-bounds write and execute arbitrary code with elevated privileges.
Remediation
Install updates from vendor's website.
External links
- https://source.android.com/docs/security/bulletin/2022-10-01#2022-10-05-security-patch-level-vulnerability-details
- https://lore.kernel.org/all/20220128090324.2727688-1-hewenliang4@huawei.com/
- https://lore.kernel.org/all/9A004C03-250B-46C5-BF39-782D7551B00E@tencent.com/
- https://android.googlesource.com/kernel/common/+/885349f53dd73