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Overview

Id RHSA-2016:0450-01
Name Red Hat 2016:0450-01 RHSA Important: kernel security update for RHEL 5 x86_64
Vendor Name red_hat
Product None
Content Type Critical Critical
Language(s)
Operating System(s) Linux 
Released On 15 Mar 2016 12:00:00

RHSA-2016:0450-01

Red Hat 2016:0450-01 RHSA Important: kernel security update for RHEL 5 x86_64

Vendor Name

red_hat

Product

None

Released On

15 Mar 2016 12:00:00

Url

https://rhn.redhat.com/errata/RHSA-2016-0450.html

Description

LSAC(v2)
The kernel packages contain the Linux kernel, the core of any Linux operating system. * An integer overflow flaw was found in the way the Linux kernel's Frame Buffer device implementation mapped kernel memory to user space via the mmap syscall. A local user able to access a frame buffer device file (/dev/fb*) could possibly use this flaw to escalate their privileges on the system. (CVE-2013-2596, Important) * It was found that the Xen hypervisor x86 CPU emulator implementation did not correctly handle certain instructions with segment overrides, potentially resulting in a memory corruption. A malicious guest user could use this flaw to read arbitrary data relating to other guests, cause a denial of service on the host, or potentially escalate their privileges on the host. (CVE-2015-2151, Important) This update also fixes the following bugs: * Previously, the CPU power of a CPU group could be zero. As a consequence, a kernel panic occurred at "find_busiest_group+570" with do_divide_error. The provided patch ensures that the division is only performed if the CPU power is not zero, and the aforementioned panic no longer occurs. (BZ#1209728) * Prior to this update, a bug occurred when performing an online resize of an ext4 file system which had been previously converted from ext3. As a consequence, the kernel crashed. The provided patch fixes online resizing for such file systems by limiting the blockgroup search loop for non-extent files, and the mentioned kernel crash no longer occurs. (BZ#1301100) All kernel users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. The system must be rebooted for this update to take effect.

Related Resources

Related Vulnerabilities

CVE-2013-2596   CVE-2015-2151  

Related Patches

Superseded Patches


Last Updated: 27 May 2016 11:23:17