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Last updated: 11/24/2014 12:12:38 AM

CVE Publication rate: 17.13

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Vulnerability Summary for CVE-2014-3940

Original release date: 06/05/2014
Last revised: 10/31/2014
Source: US-CERT/NIST

Overview

The Linux kernel through 3.14.5 does not properly consider the presence of hugetlb entries, which allows local users to cause a denial of service (memory corruption or system crash) by accessing certain memory locations, as demonstrated by triggering a race condition via numa_maps read operations during hugepage migration, related to fs/proc/task_mmu.c and mm/mempolicy.c.

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score: 4.0 (MEDIUM) (AV:L/AC:H/Au:N/C:N/I:N/A:C) (legend)
Impact Subscore: 6.9
Exploitability Subscore: 1.9
CVSS Version 2 Metrics:
Access Vector: Locally exploitable
Access Complexity: High
Authentication: Not required to exploit
Impact Type: Allows disruption of service

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External Source: MLIST
Name: [oss-security] 20140602 CVE-2014-3940 - Linux kernel - missing check during hugepage migration
External Source: MLIST
Name: [linux-kernel] 20140318 [PATCH RESEND -mm 1/2] mm: add !pte_present() check on existing hugetlb_entry callbacks
External Source: SECUNIA
Name: 59011
External Source: BID
Name: 67786
External Source: SECUNIA
Name: 61310
External Source: CONFIRM
Name: https://bugzilla.redhat.com/show_bug.cgi?id=1104097
External Source: CONFIRM
Name: https://support.f5.com/kb/en-us/solutions/public/15000/600/sol15685.html

Technical Details

Vulnerability Type (View All)