Kernel: mm/shmem: denial of service
Published Jun 23, 2014
4.7
MEDIUMCVSS 2.0
EPSS 0.44%
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.
Affected products
No data.
Configuration 1
- ≤ 3.15.1
Configuration 2
- 12.04
No data.
Red Hat Enterprise Linux 7
kernel-0:3.10.0-123.20.1.el7
Fixed · RHSA-2015:0102
Red Hat Enterprise MRG 2
kernel-rt-0:3.10.33-rt32.51.el6rt
Fixed · RHSA-2014:1318
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | kernel-0:3.10.0-123.20.1.el7 | Fixed | RHSA-2015:0102 |
| Red Hat Enterprise MRG 2 | kernel-rt-0:3.10.33-rt32.51.el6rt | Fixed | RHSA-2014:1318 |
| Red Hat Enterprise Linux 5 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue does not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 5 and Red Hat Enterprise Linux 6. This issue affects the version of the kernel package as shipped with Red Hat Enterprise Linux 7 and Red Hat Enterprise MRG 2. Future kernel updates for Red Hat Enterprise Linux 7 and Red Hat Enterprise MRG 2 may address this issue.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:L/AC:M/Au:N/C:N/I:N/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.44% (0.00440) | 35.92th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.44% (0.00440) | 34.85th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.09% (0.00089) | 23.30th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00044) | 11.89th | v3 (v2023.03.01) |
| Jul 2, 2024 | 0.04% (0.00044) | 10.25th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00044) | 8.24th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.55% (0.01547) | 74.98th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.55% (0.01547) | 74.94th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.55% (0.01547) | 72.92th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.55% (0.01547) | 51.82th | v2 (v2022.01.01) |
No CWE recorded.
References (17)
- http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00006.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00007.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://marc.info/?l=linux-mm-commits&m=140303745420549&w=2 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://ozlabs.org/~akpm/mmots/broken-out/shmem-fix-faulting-into-a-hole-while-its-punched.patch x_refsource_CONFIRMThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2014-1318.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2015-0102.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://secunia.com/advisories/59777 third-party-advisoryx_refsource_SECUNIAThird Party Advisory
- http://secunia.com/advisories/60564 third-party-advisoryx_refsource_SECUNIAThird Party Advisory
- http://www.openwall.com/lists/oss-security/2014/06/18/11 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.securityfocus.com/bid/68157 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1030450 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- http://www.ubuntu.com/usn/USN-2334-1 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- http://www.ubuntu.com/usn/USN-2335-1 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2014-4171 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1111180 x_refsource_CONFIRMIssue TrackingThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2014-4171
- https://www.cve.org/CVERecord?id=CVE-2014-4171
Change history (0)
No recorded changes yet.