SB2016062608 - Fedora 22 update for kernel
Published: June 26, 2016 Updated: April 24, 2025
Security Bulletin ID
SB2016062608
Severity
High
Patch available
YES
Number of vulnerabilities
4
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 secuirty vulnerabilities.
1) Data handling (CVE-ID: CVE-2016-4470)
The vulnerability allows a local attacker to cause DoS condition on the target system.The weakness exists in the key_reject_and_link function in security/keys/key.c due to it does not ensure that a certain data structure is initialized. A local attacker can cause the service to crash via vectors involving a crafted keyctl request2 command.
2) Resource exhaustion (CVE-ID: CVE-2016-1583)
The vulnerability allows a local attacker to cause DoS condition and gain elevated privileges on the target system.The weakness exists in the ecryptfs_privileged_open function in fs/ecryptfs/kthread.c due to stack memory consumption. A local attacker can cause the service to crash and gain elevated privileges via vectors involving crafted mmap calls for /proc pathnames, leading to recursive pagefault handling.
3) Memory corruption (CVE-ID: CVE-2016-4998)
The vulnerability allows a local user to cause denial of service conditions on the target system.The vulnerability exists due to memory access error. A local user can cause the target sysetm to crash by issuing a specially crafted IPT_SO_SET_REPLACE setsockopt() call.
Successful exploitation of this vulnerability may result in the crash of the target sysetm.
4) Memory corruption (CVE-ID: CVE-2016-4997)
The vulnerability allows a local user to obtain elevated privileges on the target system.The vulnerability exists due to a memory corruption error in the IPT_SO_SET_REPLACE compat_setsockopt() function.
Successful exploitation of this vulnerability may lead to arbitrary code execution with kernel-level privileges.
Remediation
Install update from vendor's website.