SB2016042014 - Fedora 22 update for kernel

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2016042014

SB2016042014 - Fedora 22 update for kernel

Published: April 20, 2016 Updated: April 24, 2025

Security Bulletin ID SB2016042014
Severity
High
Patch available
YES
Number of vulnerabilities 5
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 20% Medium 20% Low 60%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 5 secuirty vulnerabilities.


1) Input validation error (CVE-ID: CVE-2016-3961)

The vulnerability allows a local authenticated user to perform a denial of service (DoS) attack.

Xen and the Linux kernel through 4.5.x do not properly suppress hugetlbfs support in x86 PV guests, which allows local PV guest OS users to cause a denial of service (guest OS crash) by attempting to access a hugetlbfs mapped area.


2) Out-of-bounds read (CVE-ID: CVE-2016-3955)

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

The vulnerability exists due to an out-of-bounds read error within the usbip_recv_xbuff() function in drivers/usb/usbip/usbip_common.c. A remote non-authenticated attacker can execute arbitrary code.


3) Resource exhaustion (CVE-ID: CVE-2016-3672)

The vulnerability allows a local attacker to bypass security restrictions on the target system.

The weakness exists in the arch_pick_mmap_layout function in arch/x86/mm/mmap.c due to improper randomizing of the legacy base address. A local attacker can disable stack-consumption resource limits, defeat the intended restrictions on the ADDR_NO_RANDOMIZE flag and bypass the ASLR protection mechanism for a setuid or setgid program.

4) Race condition (CVE-ID: CVE-2015-8839)

The vulnerability allows a local non-authenticated attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a race condition within the init_once() function in fs/ext4/super.c, within the ext4_punch_hole(), ext4_setattr(), ext4_page_mkwrite() and block_page_mkwrite_return() functions in fs/ext4/inode.c, within the ext4_dax_fault() and ext4_dax_pmd_fault() functions in fs/ext4/file.c, within the ext4_zero_range(), ext4_collapse_range() and ext4_insert_range() functions in fs/ext4/extents.c. A local non-authenticated attacker can perform a denial of service (DoS) attack.


5) Double free (CVE-ID: CVE-2016-3951)

The vulnerability allows a local non-authenticated attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a double free error within the drivers/net/usb/usbnet.c. A local non-authenticated attacker can perform a denial of service (DoS) attack.


Remediation

Install update from vendor's website.

References