MEDIUM
hw: cpu: speculative register load
Published May 22, 2018
5.6
MEDIUMCVSS 3.0
EPSS 7.46%
Description
Systems with microprocessors utilizing speculative execution and that perform speculative reads of system registers may allow unauthorized disclosure of system parameters to an attacker with local user access via a side-channel analysis, aka Rogue System Register Read (RSRE), Variant 3a.
Affected products
-
- Version MultipleStatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Intel Corporation | Multiple | n/a |
|
Configuration 1
OR
- c2308
- c3308
- c3338
- c3508
- c3538
- c3558
- c3708
- c3750
- c3758
- c3808
- c3830
- c3850
- c3858
- c3950
- c3955
- c3958
- e3805
- e3815
- e3825
- e3826
- e3827
- e3845
- z2420
- z2460
- z2480
- z2520
- z2560
- z2580
- z2760
- z3460
- z3480
- z3530
- z3560
- z3570
- z3580
- z3590
- z3735d
- z3735e
- z3735f
- z3735g
- z3736f
- z3736g
- z3740
- z3740d
- z3745
- z3745d
- z3770
- z3770d
- z3775
- z3775d
- z3785
- z3795
- j3455
- j4005
- j4105
- n3450
- 32nm
- 45nm
- 32nm
- 45nm
- 32nm
- 45nm
- 32nm
- 45nm
- n4000
- n4100
- n4200
- j4205
- j5005
- n5000
- n/a
- 125c_
- 1220_
- 1275_
- 1505m_v6
- 1515m_v5
- 1535m_v5
- 1535m_v6
- 1545m_v5
- 1558l_v5
- 1565l_v5
- 1575m_v5
- 1578l_v5
- 1585_v5
- 1585l_v5
- 3600
- 5600
- 7500
- e5502
- e5503
- e5504
- e5506
- e5507
- e5520
- e5530
- e5540
- e6510
- e6540
- e6550
- l3403
- l3406
- l3426
- l5506
- l5508_
- l5518_
- l5520
- l5530
- w5580
- w5590
- x3430
- x3440
- x3450
- x3460
- x3470
- x3480
- x5550
- x5560
- x5570
- n/a
- n/a
- n/a
- n/a
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- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- 2650l_v4
- 2658
- 2658_v2
- 2658_v3
- 2658_v4
- 2658a_v3
- 2660
- 2660_v2
- 2660_v3
- 2660_v4
- 2665
- 2667
- 2667_v2
- 2667_v3
- 2667_v4
- 2670
- 2670_v2
- 2670_v3
- 2680
- 2680_v2
- 2680_v3
- 2680_v4
- 2683_v3
- 2683_v4
- 2687w
- 2687w_v2
- 2687w_v3
- 2687w_v4
- 2690
- 2690_v2
- 2690_v3
- 2690_v4
- 2695_v2
- 2695_v3
- 2695_v4
- 2697_v2
- 2697_v3
- 2697_v4
- 2697a_v4
- 2698_v3
- 2698_v4
- 2699_v3
- 2699_v4
- 2699a_v4
- 2699r_v4
- 4603
- 4603_v2
- 4607
- 4607_v2
- 4610
- 4610_v2
- 4610_v3
- 4610_v4
- 4617
- 4620
- 4620_v2
- 4620_v3
- 4620_v4
- 4624l_v2
- 4627_v2
- 4627_v3
- 4627_v4
- 4628l_v4
- 4640
- 4640_v2
- 4640_v3
- 4640_v4
- 4648_v3
- 4650
- 4650_v2
- 4650_v3
- 4650_v4
- 4650l
- 4655_v3
- 4655_v4
- 4657l_v2
- 4660_v3
- 4660_v4
- 4667_v3
- 4667_v4
- 4669_v3
- 4669_v4
- n/a
- n/a
- n/a
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- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- 2803
- 2820
- 2830
- 2850
- 2850_v2
- 2860
- 2870
- 2870_v2
- 2880_v2
- 2890_v2
- 4807
- 4809_v2
- 4809_v3
- 4809_v4
- 4820
- 4820_v2
- 4820_v3
- 4820_v4
- 4830
- 4830_v2
- 4830_v3
- 4830_v4
- 4850
- 4850_v2
- 4850_v3
- 4850_v4
- 4860
- 4860_v2
- 4870
- 4870_v2
- 4880_v2
- 4890_v2
- 8830
- 8837
- 8850
- 8850_v2
- 8857_v2
- 8860
- 8860_v3
- 8860_v4
- 8867_v3
- 8867_v4
- 8867l
- 8870
- 8870_v2
- 8870_v3
- 8870_v4
- 8880_v2
- 8880_v3
- 8880_v4
- 8880l_v2
- 8880l_v3
- 8890_v2
- 8890_v3
- 8890_v4
- 8891_v2
- 8891_v3
- 8891_v4
- 8893_v2
- 8893_v3
- 8893_v4
- 8894_v4
- 5115
- 85115
- 85118
- 85119t
- 85120
- 85120t
- 85122
- 86126
- 86126f
- 86126t
- 86128
- 86130
- 86130f
- 86130t
- 86132
- 86134
- 86134m
- 86136
- 86138
- 86138f
- 86138t
- 86140
- 86140m
- 86142
- 86142f
- 86142m
- 86144
- 86146
- 86148
- 86148f
- 86150
- 86152
- 86154
- 8153
- 8156
- 8158
- 8160
- 8160f
- 8160m
- 8160t
- 8164
- 8168
- 8170
- 8170m
- 8176
- 8176f
- 8176m
- 8180
- 4108
- 4109t
- 4110
- 4112
- 4114
- 4114t
- 4116
- 4116t
No data.
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Not affected
Red Hat Enterprise Linux 7
kernel-alt
Not affected
Red Hat Enterprise Linux 7
kernel-rt
Not affected
Red Hat Enterprise MRG 2
kernel-rt
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel-alt | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise MRG 2 | kernel-rt | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This is a hardware issue and is not currently planned to be mitigated in software (in the Linux kernel). As such, we do not plan to provide mitigations for this issue in the kernel packages as shipped with Red Hat Enterprise Linux 5, 6, 7, and Red Hat Enterprise MRG 2. Future CPU vendor microcode updates may address this issue.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
5.6 MEDIUM NVD
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Attack Vector Local
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Changed
Confidentiality Impact High
Integrity Impact None
Availability Impact None
1 other source (Red Hat) ▾
2.8 LOW Red Hat
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N
Attack Vector Local
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Changed
Confidentiality Impact Low
Integrity Impact None
Availability Impact None
4.7 MEDIUM NVD
AV:L/AC:M/Au:N/C:C/I:N/A:N
Access Vector Local
Access Complexity Medium
Authentication None
Confidentiality Impact Complete
Integrity Impact None
Availability Impact None
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
7.46% 0.07459
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.07459
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (21 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 7.46% (0.07459) | 94.28th | v5 (v2026.06.15) |
| Jun 15, 2026 | 7.56% (0.07556) | 93.72th | v5 (v2026.06.15) |
| Apr 21, 2026 | 1.34% (0.01343) | 80.06th | v4 (v2025.03.14) |
| Nov 18, 2025 | 0.14% (0.00141) | 28.68th | v4 (v2025.03.14) |
| Mar 30, 2025 | 1.27% (0.01271) | 77.64th | v4 (v2025.03.14) |
| Mar 29, 2025 | 2.86% (0.02856) | 77.07th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.11% (0.01108) | 76.61th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.26% (0.00258) | 66.05th | v3 (v2023.03.01) |
| Mar 30, 2024 | 0.26% (0.00258) | 64.98th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.26% (0.00264) | 65.08th | v3 (v2023.03.01) |
| May 8, 2023 | 0.26% (0.00264) | 62.44th | v3 (v2023.03.01) |
| Mar 12, 2023 | 0.32% (0.00324) | 66.02th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.22% (0.00217) | 57.84th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.92% (0.01916) | 77.44th | v2 (v2022.01.01) |
| Feb 16, 2023 | 1.92% (0.01916) | 76.97th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.86% (0.01864) | 75.17th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.86% (0.01864) | 54.47th | v2 (v2022.01.01) |
| Feb 3, 2022 | 4.37% (0.04373) | 74.68th | v1 |
| Jan 6, 2022 | 4.37% (0.04373) | 74.46th | v1 |
| Sep 1, 2021 | 4.37% (0.04373) | 83.57th | v1 |
| Apr 14, 2021 | 4.37% (0.04373) | 0.00th | v1 |
References (27)
- http://support.lenovo.com/us/en/solutions/LEN-22133 x_refsource_CONFIRMThird Party Advisory
- http://www.fujitsu.com/global/support/products/software/security/products-f/cve-2018-3639e.html x_refsource_CONFIRMThird Party Advisory
- http://www.securityfocus.com/bid/104228 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1040949 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1042004 vdb-entryx_refsource_SECTRACK
- https://access.redhat.com/security/cve/CVE-2018-3640 Vendor Advisory
- https://access.redhat.com/solutions/3452311
- https://bugzilla.redhat.com/show_bug.cgi?id=1580340 Issue Tracking
- https://cert-portal.siemens.com/productcert/pdf/ssa-268644.pdf x_refsource_CONFIRM
- https://cert-portal.siemens.com/productcert/pdf/ssa-608355.pdf x_refsource_CONFIRM
- https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability x_refsource_CONFIRMVendor Advisory
- https://lists.debian.org/debian-lts-announce/2018/07/msg00038.html mailing-listx_refsource_MLIST
- https://lists.debian.org/debian-lts-announce/2018/09/msg00017.html mailing-listx_refsource_MLIST
- https://nvd.nist.gov/vuln/detail/CVE-2018-3640
- https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/ADV180013 x_refsource_CONFIRMPatchThird Party AdvisoryVendor Advisory
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0005 x_refsource_CONFIRM
- https://security.netapp.com/advisory/ntap-20180521-0001/ x_refsource_CONFIRMThird Party Advisory
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03850en_us x_refsource_CONFIRMThird Party Advisory
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180521-cpusidechannel vendor-advisoryx_refsource_CISCOThird Party Advisory
- https://usn.ubuntu.com/3756-1/ vendor-advisoryx_refsource_UBUNTU
- https://www.cve.org/CVERecord?id=CVE-2018-3640
- https://www.debian.org/security/2018/dsa-4273 vendor-advisoryx_refsource_DEBIAN
- https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00115.html x_refsource_CONFIRMVendor Advisory
- https://www.kb.cert.org/vuls/id/180049 third-party-advisoryx_refsource_CERT-VNThird Party AdvisoryUS Government Resource
- https://www.mitel.com/en-ca/support/security-advisories/mitel-product-security-advisory-18-0006 x_refsource_CONFIRM
- https://www.synology.com/support/security/Synology_SA_18_23 x_refsource_CONFIRMThird Party Advisory
- https://www.us-cert.gov/ncas/alerts/TA18-141A third-party-advisoryx_refsource_CERTThird Party AdvisoryUS Government Resource
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner intel
Published May 22, 2018
Updated Sep 16, 2024
Reserved Dec 28, 2017
Link CVE-2018-3640
CISA Vulnrichment
Updated n/a