Race condition in Linux kernel - CVE-2014-3940
Published: June 5, 2014 / Updated: April 22, 2019
Vulnerability identifier: #VU95722
CSH Severity: Low
CVSS v4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2014-3940
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to perform a denial of service (DoS) attack.
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 software
Linux kernel
Ubuntu
linux (Ubuntu package)
linux-lts-trusty (Ubuntu package)
Ubuntu
linux (Ubuntu package)
linux-lts-trusty (Ubuntu package)
How to mitigate CVE-2014-3940
Install update from vendor's repository.
linux (Ubuntu package) - update to 3.13.0-32.57
linux-lts-trusty (Ubuntu package) - update to 3.13.0-32.57~precise1
linux-lts-trusty (Ubuntu package) - update to 3.13.0-32.57~precise1
External References
- http://www.openwall.com/lists/oss-security/2014/06/02/5
- https://bugzilla.redhat.com/show_bug.cgi?id=1104097
- https://lkml.org/lkml/2014/3/18/784
- http://www.securityfocus.com/bid/67786
- http://secunia.com/advisories/59011
- https://support.f5.com/kb/en-us/solutions/public/15000/600/sol15685.html
- http://secunia.com/advisories/61310
- http://rhn.redhat.com/errata/RHSA-2015-0290.html
- http://rhn.redhat.com/errata/RHSA-2015-1272.html