#VU1039 Privilege escalation in Linux kernel - CVE-2016-5195
Published: October 22, 2016 / Updated: December 15, 2022
Vulnerability identifier: #VU1039
Vulnerability risk: Medium
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:A/U:Green
CVE-ID: CVE-2016-5195
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
The vulnerability is being exploited in the wild
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local user to obtain elevated privileges on the target system.
The weakness is due to race condition in the kernel memory subsystem in the management of copy-on-write operations on read-only memory mappings that lets attackers to overwrite kernel memory and gain kernel-level privileges.
Successful exploitation of the vulnerability results in gaining of root privileges on the vulnerable system.
Note: the vulnerability was being actively exploited.
The weakness is due to race condition in the kernel memory subsystem in the management of copy-on-write operations on read-only memory mappings that lets attackers to overwrite kernel memory and gain kernel-level privileges.
Successful exploitation of the vulnerability results in gaining of root privileges on the vulnerable system.
Note: the vulnerability was being actively exploited.
Remediation
Update to version 4.9-rc2.
https://cdn.kernel.org/pub/linux/kernel/v4.x/testing/linux-4.9-rc2.tar.xz
https://cdn.kernel.org/pub/linux/kernel/v4.x/testing/linux-4.9-rc2.tar.xz