Vulnerability Description
mm/shmem.c in the Linux kernel through 3.15.1 does not properly implement the interaction between range notification and hole punching, which allows local users to cause a denial of service (i_mutex hold) by using the mmap system call to access a hole, as demonstrated by interfering with intended shmem activity by blocking completion of (1) an MADV_REMOVE madvise call or (2) an FALLOC_FL_PUNCH_HOLE fallocate call.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | <= 3.15.1 |
| Canonical | Ubuntu Linux | 12.04 |
References
- http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00006.htmlMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00007.htmlMailing ListThird Party Advisory
- http://marc.info/?l=linux-mm-commits&m=140303745420549&w=2Mailing ListThird Party Advisory
- http://ozlabs.org/~akpm/mmots/broken-out/shmem-fix-faulting-into-a-hole-while-itThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2014-1318.htmlThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2015-0102.htmlThird Party Advisory
- http://secunia.com/advisories/59777Third Party Advisory
- http://secunia.com/advisories/60564Third Party Advisory
- http://www.openwall.com/lists/oss-security/2014/06/18/11Mailing ListThird Party Advisory
- http://www.securityfocus.com/bid/68157Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1030450Third Party AdvisoryVDB Entry
- http://www.ubuntu.com/usn/USN-2334-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-2335-1Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1111180Issue TrackingThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00006.htmlMailing ListThird Party Advisory
FAQ
What is CVE-2014-4171?
CVE-2014-4171 is a vulnerability with a CVSS score of 4.7 (MEDIUM). mm/shmem.c in the Linux kernel through 3.15.1 does not properly implement the interaction between range notification and hole punching, which allows local users to cause a denial of service (i_mutex h...
How severe is CVE-2014-4171?
CVE-2014-4171 has been rated MEDIUM with a CVSS base score of 4.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2014-4171?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Canonical Ubuntu Linux.