SB2016011906 - Ubuntu update for Linux kernel (Utopic HWE)
Published: January 19, 2016 Updated: December 4, 2022
Security Bulletin ID
SB2016011906
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Use-after-free error (CVE-ID: CVE-2016-0728)
The vulnerability allows a local attacker to gain elevated privileges on the target system.The weakness exists due to use-after-free error in the join_session_keyring() function in security/keys/process_keys.c when handling keyring object reference counting by Linux kernel's key management subsystem. A local attacker can overflow the usage field via a specially crafted object and execute arbitrary code with root privileges.
Successful exploitation of the vulnerability may result in arbitrary code execution on the vulnerable system.
Note: the vulnerability was being actively exploited.
Remediation
Install update from vendor's website.