Vulnerability CVE-2014-3122
Published: 2014-05-11   Modified: 2014-05-12

Description:
The try_to_unmap_cluster function in mm/rmap.c in the Linux kernel before 3.14.3 does not properly consider which pages must be locked, which allows local users to cause a denial of service (system crash) by triggering a memory-usage pattern that requires removal of page-table mappings.

See advisories in our WLB2 database:
Topic
Author
Date
Med.
Linux Kernel mm/try_to_unmap_cluster() should lock_page() before mlocking
P J P
02.05.2014

Type:

CWE-264

 (Permissions, Privileges, and Access Controls)

CVSS2 => (AV:L/AC:L/Au:N/C:N/I:N/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.9/10
6.9/10
3.9/10
Exploit range
Attack complexity
Authentication
Local
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Complete
Affected software
Linux -> Linux kernel 

 References:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=57e68e9cd65b4b8eb4045a1e0d0746458502554c
http://www.debian.org/security/2014/dsa-2926
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.14.3
http://www.openwall.com/lists/oss-security/2014/05/01/7
http://www.securityfocus.com/bid/67162
http://www.ubuntu.com/usn/USN-2240-1
https://bugzilla.redhat.com/show_bug.cgi?id=1093076
https://github.com/torvalds/linux/commit/57e68e9cd65b4b8eb4045a1e0d0746458502554c
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