CVE-2014-3940

Published: 5 June 2014

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.

From the Ubuntu Security Team

A flaw was discovered in the Linux kernel's handling of hugetlb entries. A local user could exploit this flaw to cause a denial service (memory corruption or system crash).

Notes

android kernels (goldfish, grouper, maguro, mako and manta) are not
supported on the Ubuntu Touch 13.10 preview kernels
android kernels (flo, goldfish, grouper, maguro, mako and manta) are
not supported on the Ubuntu Touch 14.04 preview kernels

Status

References

• https://lkml.org/lkml/2014/3/18/784
• https://bugzilla.redhat.com/show_bug.cgi?id=1104097
• http://www.openwall.com/lists/oss-security/2014/06/02/5
• https://ubuntu.com/security/notices/USN-2288-1
• https://ubuntu.com/security/notices/USN-2290-1
• https://www.cve.org/CVERecord?id=CVE-2014-3940
• NVD
• Launchpad
• Debian

Bugs

• https://launchpad.net/bugs/1327487