CVE-2016-0617

Impact:
Moderate
Public Date:
2016-02-08
CWE:
CWE-772
Bugzilla:
1305803: CVE-2016-0617 kernel: hugetlbfs: fix bugs in hugetlb_vmtruncate_list()
A resource-management flaw was found in the Linux kernel's hugetlbfs handling of punching holes in hugetlbfs files with either truncate or fallocate. When truncating a hugetlbfs file, this bug could prevent some pages from being unmapped, which panics the system. With fallocate, pages could be prevented from being unmapped and then not removed, or more pages than desired could be unmapped (causing page faults to reestablish the mappings on subsequent page access). A local, non-privileged attacker could exploit this flaw by issuing a sequence of huge-page memory requests that crash the system (denial of service).

Find out more about CVE-2016-0617 from the MITRE CVE dictionary dictionary and NIST NVD.

Statement

This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6, 7 and MRG-2, as the code with the flaw is not present in the products listed.

CVSS v2 metrics

NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.

Base Score 4.9
Base Metrics AV:L/AC:L/Au:N/C:N/I:N/A:C
Access Vector Local
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Complete

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Affected Packages State

Platform Package State
Red Hat Enterprise MRG 2 realtime-kernel Not affected
Red Hat Enterprise Linux 7 kernel-rt Not affected
Red Hat Enterprise Linux 7 kernel Not affected
Red Hat Enterprise Linux 6 kernel Not affected
Red Hat Enterprise Linux 5 kernel Not affected

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