SB2016022201 - Ubuntu update for Linux kernel
Published: February 22, 2016
Security Bulletin ID
SB2016022201
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) NULL pointer dereference/Race condition (CVE-ID: CVE-2015-7550)
The vulnerability allows a local attacker to cause DoS condition on the target system.The weakness in the keyctl_read_key function in security/keys/keyctl.c due to improper use of a semaphore. A local attacker can submit a specially crafted application that leverages a race condition between keyctl_revoke and keyctl_read calls, trigger NULL pointer dereference and cause the service o crash.
Remediation
Install update from vendor's website.