CVE-2014-8173

7.2 · HIGH

Published Mar 16, 2015 linux EPSS 0.40% (34th pctl) AV:L/AC:L/Au:N/C:C/I:C/A:C

Overview

CVE-2014-8173 is a high-severity vulnerability affecting linux linux_kernel. It was published on March 16, 2015 and has a CVSS 2.0 base score of 7.2 (HIGH).

This vulnerability has a CVSS 2.0 base score of 7.2, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical Description

The pmd_none_or_trans_huge_or_clear_bad function in include/asm-generic/pgtable.h in the Linux kernel before 3.13 on NUMA systems does not properly determine whether a Page Middle Directory (PMD) entry is a transparent huge-table entry, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via a crafted MADV_WILLNEED madvise system call that leverages the absence of a page-table lock.

Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected Products

Vendor	Product	Versions	Status
linux	linux_kernel	>= 3.9, < 3.10.76	Affected

References

Ref git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=ee53664bda169f519ce3c6a22d378f0b946c8178 Ref lists.opensuse.org/opensuse-security-announce/2015-04/msg00009.html Ref rhn.redhat.com/errata/RHSA-2015-0290.html Ref rhn.redhat.com/errata/RHSA-2015-0694.html Ref bugzilla.redhat.com/show_bug.cgi?id=1198457 GitHub github.com/torvalds/linux/commit/ee53664bda169f519ce3c6a22d378f0b946c8178 Ref git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=ee53664bda169f519ce3c6a22d378f0b946c8178 Ref lists.opensuse.org/opensuse-security-announce/2015-04/msg00009.html Ref rhn.redhat.com/errata/RHSA-2015-0290.html Ref rhn.redhat.com/errata/RHSA-2015-0694.html

Frequently Asked Questions

What is CVE-2014-8173?

CVE-2014-8173 is a high-severity vulnerability affecting linux linux_kernel. It was published on March 16, 2015 and has a CVSS 2.0 base score of 7.2 (HIGH).

How severe is CVE-2014-8173?

This vulnerability has a CVSS 2.0 base score of 7.2, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2014-8173?

How can CyberStrike help with CVE-2014-8173?

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