mm/shmem.c in the Linux kernel through 3.15.1 does not properly implement the interaction…
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Medium
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Complete
- Fix status
- Fixed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat.
Summary
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.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
Red Hat 2 advisories
- RHSA-2015:0102 Released 2015-01-28 · Red Hat rating Importantkernel security and bug fix update
- Red Hat Enterprise Linux Client (v. 7) kernel-3.10.0-123.20.1.el7, kernel-abi-whitelists-3.10.0-123.20.1.el7, kernel-debug-3.10.0-123.20.1.el7 +6
- Red Hat Enterprise Linux Client Optional (v. 7) kernel-doc-3.10.0-123.20.1.el7, kernel-tools-libs-devel-3.10.0-123.20.1.el7, python-perf-3.10.0-123.20.1.el7
- Red Hat Enterprise Linux ComputeNode (v. 7) kernel-3.10.0-123.20.1.el7, kernel-abi-whitelists-3.10.0-123.20.1.el7, kernel-debug-3.10.0-123.20.1.el7 +6
- Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-doc-3.10.0-123.20.1.el7, kernel-tools-libs-devel-3.10.0-123.20.1.el7, python-perf-3.10.0-123.20.1.el7
- Red Hat Enterprise Linux Server (v. 7) kernel-3.10.0-123.20.1.el7, kernel-abi-whitelists-3.10.0-123.20.1.el7, kernel-bootwrapper-3.10.0-123.20.1.el7 +9
- Red Hat Enterprise Linux Server Optional (v. 7) kernel-doc-3.10.0-123.20.1.el7, kernel-tools-libs-devel-3.10.0-123.20.1.el7, python-perf-3.10.0-123.20.1.el7
- Red Hat Enterprise Linux Workstation (v. 7) kernel-3.10.0-123.20.1.el7, kernel-abi-whitelists-3.10.0-123.20.1.el7, kernel-debug-3.10.0-123.20.1.el7 +6
- Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-doc-3.10.0-123.20.1.el7, kernel-tools-libs-devel-3.10.0-123.20.1.el7, python-perf-3.10.0-123.20.1.el7
- RHSA-2014:1318 Released 2014-09-29 · Red Hat rating ModerateRed Hat Enterprise MRG Realtime 2.5 security and enhancement update
- Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt-3.10.33-rt32.51.el6rt, kernel-rt-debug-3.10.33-rt32.51.el6rt, kernel-rt-debug-devel-3.10.33-rt32.51.el6rt +7
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2015:0102 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2015:0102 |
| Red Hat Enterprise Linux ComputeNode (v. 7) | Fixed | RHSA-2015:0102 |
| Red Hat Enterprise Linux ComputeNode Optional (v. 7) | Fixed | RHSA-2015:0102 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2015:0102 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2015:0102 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2015:0102 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2015:0102 |
| Red Hat MRG Realtime for RHEL 6 Server v.2 | Fixed | RHSA-2014:1318 |
Not affected: 2 products
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
Timeline
- 2026-10-02 Threatist record created from CVE-2014-4171
- 2026-10-03 Alias added: GHSA-p5vf-58qw-qq73
References
Advisory 10
- [mm-commits] 20140617 + shmem-fix-faulting-into-a-hole-while-its-punched.patch added to -mm tree
- RHSA-2014:1318
- https://bugzilla.redhat.com/show_bug.cgi?id=1111180
- SUSE-SU-2014:1316
- USN-2335-1
- USN-2334-1
- http://ozlabs.org/~akpm/mmots/broken-out/shmem-fix-faulting-into-a-hole-while-its-punched.patch
- SUSE-SU-2014:1319
- [oss-security] 20140618 CVE-2014-4171 - Linux kernel mm/shmem.c denial of service
- RHSA-2015:0102
Sources
- CVE-2014-4171 · CVE Program
- CVE-2014-4171 · NVD
- FIRST EPSS
- GHSA-p5vf-58qw-qq73 · GitHub Advisory Database · CC BY 4.0
- CVE-2014-4171 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences