Buffer overflow in Linux kernel - CVE-2021-39802
Published: April 8, 2022
Vulnerability identifier: #VU61998
CSH Severity: Low
CVSS v4: 8.5 [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]
CVE-ID: CVE-2021-39802
CWE-ID: CWE-119
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error in Scudo memory allocator in Linux kernel. A local user can trigger memory corruption and execute arbitrary code with elevated privileges.
Affected software
Linux kernel
Google Android
Google Android
How to mitigate CVE-2021-39802
Install updates from vendor's website.
Google Android - addressed in versions 10 2022-04-05, 11 2022-04-05, 12L 2022-04-05, 12 2022-04-05
External References
- https://source.android.com/security/bulletin/2022-04-01#details-05
- https://android.googlesource.com/kernel/common/+/ac4488815518c
- https://android.googlesource.com/kernel/common/+/b44e46bb047d1
- https://android.googlesource.com/kernel/common/+/67d075d23a8bc
- https://android.googlesource.com/kernel/common/+/6f9aba5a20b84