SB2016062608 - Fedora 22 update for kernel

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Main Vulnerability Database SB2016062608

SB2016062608 - Fedora 22 update for kernel

Published: June 26, 2016 Updated: April 24, 2025

Security Bulletin ID SB2016062608
CSH Severity
High
Patch available
YES
Number of vulnerabilities 4
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

High 25% Medium 25% Low 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 4 vulnerabilities.


1) Data handling (CVE-ID: CVE-2016-4470)

CWE-ID: CWE-19 - Data Handling

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


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)

CWE-ID: CWE-400 - Resource exhaustion

CVSSv4: 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:P/U:Clear


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)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green


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)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: 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:Amber


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.

References