CVE-2014-4171
CVE-2014-4171 is a medium-severity vulnerability in Linux Linux Kernel with a CVSS 2.0 base score of 4.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- Severity: Medium (CVSS 2.0 base score 4.7)
- EPSS exploit prediction: 0% (35th percentile)
- Actively exploited: Not listed in CISA KEV
- Affected product: Linux Linux Kernel
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2014-4171?
- 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.
- How severe is CVE-2014-4171?
- CVE-2014-4171 has a CVSS 2.0 base score of 4.7, rated medium severity.
- Is CVE-2014-4171 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2014-4171?
- CVE-2014-4171 primarily affects Linux Linux Kernel. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2014-4171?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2014-4171 published?
- CVE-2014-4171 was published on 2014-06-23 and last updated on 2026-06-17.
References
- http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00006.html
- http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00007.html
- http://marc.info/?l=linux-mm-commits&m=140303745420549&w=2
- http://ozlabs.org/~akpm/mmots/broken-out/shmem-fix-faulting-into-a-hole-while-its-punched.patch
- http://rhn.redhat.com/errata/RHSA-2014-1318.html
- http://rhn.redhat.com/errata/RHSA-2015-0102.html
- http://secunia.com/advisories/59777
- http://secunia.com/advisories/60564
- http://www.openwall.com/lists/oss-security/2014/06/18/11
- http://www.securityfocus.com/bid/68157
- http://www.securitytracker.com/id/1030450
- http://www.ubuntu.com/usn/USN-2334-1
- http://www.ubuntu.com/usn/USN-2335-1
- https://bugzilla.redhat.com/show_bug.cgi?id=1111180
Affected products (2)
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*
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