#VU61997 Use-after-free in Linux kernel


Published: 2022-04-07

Vulnerability identifier: #VU61997

Vulnerability risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-39801

CWE-ID: CWE-416

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error in ION_IOC_ALLOC in Linux kernel. A local user can send a specially crafted IOCTL request, trigger a use-after-free error and execute arbitrary code with elevated privileges.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel: All versions


CPE

External links
http://source.android.com/security/bulletin/2022-04-01#details-05
http://android.googlesource.com/kernel/common/+/504e1d6ee65d5
http://android.googlesource.com/kernel/common/+/a8200613c8c9f
http://android.googlesource.com/kernel/common/+/c47385c73fced


Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?


Latest bulletins with this vulnerability