The Linux kernel through 3.14.5 does not properly consider the presence of hugetlb…
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- High
- 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
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.
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
CPE configurations NVD · 16
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* | 6.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_mrg:2.0:*:*:*:*:*:*:* | 2.0 | Vulnerable | Red Hat |
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | up to 3.14.5 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:3.14:-:*:*:*:*:*:* | 3.14 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:3.14:rc1:*:*:*:*:*:* | 3.14 rc1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:3.14:rc2:*:*:*:*:*:* | 3.14 rc2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:3.14:rc3:*:*:*:*:*:* | 3.14 rc3 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:3.14:rc4:*:*:*:*:*:* | 3.14 rc4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:3.14:rc5:*:*:*:*:*:* | 3.14 rc5 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:3.14:rc6:*:*:*:*:*:* | 3.14 rc6 | Vulnerable | Linux |
- cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_mrg:2.0:*:*:*:*:*:*:* Versions 2.0 Vulnerable ·Red Hat
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions up to 3.14.5 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:3.14:-:*:*:*:*:*:* Versions 3.14 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:3.14:rc1:*:*:*:*:*:* Versions 3.14 rc1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:3.14:rc2:*:*:*:*:*:* Versions 3.14 rc2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:3.14:rc3:*:*:*:*:*:* Versions 3.14 rc3 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:3.14:rc4:*:*:*:*:*:* Versions 3.14 rc4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:3.14:rc5:*:*:*:*:*:* Versions 3.14 rc5 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:3.14:rc6:*:*:*:*:*:* Versions 3.14 rc6 Vulnerable ·Linux
Show 6 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:3.14:rc7:*:*:*:*:*:* | 3.14 rc7 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:3.14:rc8:*:*:*:*:*:* | 3.14 rc8 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:3.14.1:*:*:*:*:*:*:* | 3.14.1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:3.14.2:*:*:*:*:*:*:* | 3.14.2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:3.14.3:*:*:*:*:*:*:* | 3.14.3 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:3.14.4:*:*:*:*:*:*:* | 3.14.4 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:3.14:rc7:*:*:*:*:*:* Versions 3.14 rc7 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:3.14:rc8:*:*:*:*:*:* Versions 3.14 rc8 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:3.14.1:*:*:*:*:*:*:* Versions 3.14.1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:3.14.2:*:*:*:*:*:*:* Versions 3.14.2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:3.14.3:*:*:*:*:*:*:* Versions 3.14.3 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:3.14.4:*:*:*:*:*:*:* Versions 3.14.4 Vulnerable ·Linux
Remediation
Red Hat 3 advisories
- RHSA-2015:1272 Released 2015-07-20 · Red Hat rating Moderatekernel security, bug fix, and enhancement update
- Red Hat Enterprise Linux Desktop (v. 6) kernel-2.6.32-573.el6, kernel-abi-whitelists-2.6.32-573.el6, kernel-debug-2.6.32-573.el6 +6
- Red Hat Enterprise Linux Desktop Optional (v. 6) python-perf-2.6.32-573.el6
- Red Hat Enterprise Linux HPC Node (v. 6) kernel-2.6.32-573.el6, kernel-abi-whitelists-2.6.32-573.el6, kernel-debug-2.6.32-573.el6 +6
- Red Hat Enterprise Linux HPC Node Optional (v. 6) python-perf-2.6.32-573.el6
- Red Hat Enterprise Linux Server (v. 6) kernel-2.6.32-573.el6, kernel-abi-whitelists-2.6.32-573.el6, kernel-bootwrapper-2.6.32-573.el6 +9
- Red Hat Enterprise Linux Server Optional (v. 6) python-perf-2.6.32-573.el6
- Red Hat Enterprise Linux Workstation (v. 6) kernel-2.6.32-573.el6, kernel-abi-whitelists-2.6.32-573.el6, kernel-debug-2.6.32-573.el6 +6
- Red Hat Enterprise Linux Workstation Optional (v. 6) python-perf-2.6.32-573.el6
- RHSA-2015:0290 Released 2015-03-05 · Red Hat rating Importantkernel security, bug fix, and enhancement update
- Red Hat Enterprise Linux Client (v. 7) kernel-3.10.0-229.el7, kernel-abi-whitelists-3.10.0-229.el7, kernel-debug-3.10.0-229.el7 +7
- Red Hat Enterprise Linux Client Optional (v. 7) kernel-tools-libs-devel-3.10.0-229.el7, python-perf-3.10.0-229.el7
- Red Hat Enterprise Linux ComputeNode (v. 7) kernel-3.10.0-229.el7, kernel-abi-whitelists-3.10.0-229.el7, kernel-debug-3.10.0-229.el7 +7
- Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-tools-libs-devel-3.10.0-229.el7, python-perf-3.10.0-229.el7
- Red Hat Enterprise Linux Server (v. 7) kernel-3.10.0-229.el7, kernel-abi-whitelists-3.10.0-229.el7, kernel-bootwrapper-3.10.0-229.el7 +10
- Red Hat Enterprise Linux Server Optional (v. 7) kernel-tools-libs-devel-3.10.0-229.el7, python-perf-3.10.0-229.el7
- Red Hat Enterprise Linux Workstation (v. 7) kernel-3.10.0-229.el7, kernel-abi-whitelists-3.10.0-229.el7, kernel-debug-3.10.0-229.el7 +7
- Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-tools-libs-devel-3.10.0-229.el7, python-perf-3.10.0-229.el7
- RHSA-2014:0913 Released 2014-07-22 · Red Hat rating Importantkernel-rt security update
- Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt-3.10.33-rt32.43.el6rt, kernel-rt-debug-3.10.33-rt32.43.el6rt, kernel-rt-debug-devel-3.10.33-rt32.43.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-2015:0290 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2015:0290 |
| Red Hat Enterprise Linux ComputeNode (v. 7) | Fixed | RHSA-2015:0290 |
| Red Hat Enterprise Linux ComputeNode Optional (v. 7) | Fixed | RHSA-2015:0290 |
| Red Hat Enterprise Linux Desktop (v. 6) | Fixed | RHSA-2015:1272 |
| Red Hat Enterprise Linux Desktop Optional (v. 6) | Fixed | RHSA-2015:1272 |
| Red Hat Enterprise Linux HPC Node (v. 6) | Fixed | RHSA-2015:1272 |
| Red Hat Enterprise Linux HPC Node Optional (v. 6) | Fixed | RHSA-2015:1272 |
| Red Hat Enterprise Linux Server (v. 6) | Fixed | RHSA-2015:1272 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2015:0290 |
| Red Hat Enterprise Linux Server Optional (v. 6) | Fixed | RHSA-2015:1272 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2015:0290 |
| Red Hat Enterprise Linux Workstation (v. 6) | Fixed | RHSA-2015:1272 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2015:0290 |
| Red Hat Enterprise Linux Workstation Optional (v. 6) | Fixed | RHSA-2015:1272 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2015:0290 |
| Red Hat MRG Realtime for RHEL 6 Server v.2 | Fixed | RHSA-2014:0913 |
Not affected: 1 product
- Red Hat Enterprise Linux 5
Timeline
- 2026-10-02 Threatist record created from CVE-2014-3940
- 2026-10-03 Alias added: GHSA-pp3m-vq48-qr56
References
Advisory 2
Other 4
- https://bugzilla.redhat.com/show_bug.cgi?id=1104097
- [linux-kernel] 20140318 [PATCH RESEND -mm 1/2] mm: add !pte_present() check on existing hugetlb_entry callbacks
- https://support.f5.com/kb/en-us/solutions/public/15000/600/sol15685.html
- [oss-security] 20140602 CVE-2014-3940 - Linux kernel - missing check during hugepage migration
Sources
- CVE-2014-3940 · CVE Program
- CVE-2014-3940 · NVD
- FIRST EPSS
- GHSA-pp3m-vq48-qr56 · GitHub Advisory Database · CC BY 4.0
- CVE-2014-3940 · Red Hat security data · CC BY 4.0
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