CVE-2014-3940

Severity: medium (CVSS 4.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2014-06-05 · updated 2026-06-17
Weakness: CWE-362

Description

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.

Affected products

Linux kernel: through 3.14.5; 3.14, 3.14-rc1, 3.14-rc2, 3.14-rc3, 3.14-rc4, 3.14-rc5 (+7)
Red Hat Enterprise Linux: 6.0
RedHat Enterprise Mrg: 2.0

References

http://rhn.redhat.com/errata/RHSA-2015-0290.html
http://rhn.redhat.com/errata/RHSA-2015-1272.html
http://secunia.com/advisories/59011
http://secunia.com/advisories/61310
http://www.openwall.com/lists/oss-security/2014/06/02/5
http://www.securityfocus.com/bid/67786
https://bugzilla.redhat.com/show_bug.cgi?id=1104097
https://lkml.org/lkml/2014/3/18/784
https://support.f5.com/kb/en-us/solutions/public/15000/600/sol15685.html
http://rhn.redhat.com/errata/RHSA-2015-0290.html
http://rhn.redhat.com/errata/RHSA-2015-1272.html
http://secunia.com/advisories/59011

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