CVE & CISA-KEV Catalog

CVE-2018-3639

MEDIUMEPSS 99th pctl
5.5
CVSS v3
NVD

Description

Systems with microprocessors utilizing speculative execution and speculative execution of memory reads before the addresses of all prior memory writes are known may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis, aka Speculative Store Bypass (SSB), Variant 4.

CWE-203

How to fix

Remediation Available
intel-microcodeDebian
Fixed in:3.20180703.1CVE-2018-3639
Fixed in:3.20180703.1CVE-2018-3639
Fixed in:3.20180703.1CVE-2018-3639
Fixed in:3.20180703.1CVE-2018-3639
intel-microcodeUbuntu
Fixed in:3.20180807a.0ubuntu0.14.04.1USN-3756-1
Fixed in:3.20180807a.0ubuntu0.16.04.1USN-3756-1
Fixed in:3.20180807a.0ubuntu0.18.04.1USN-3756-1
libvirtUbuntu
Fixed in:1.2.2-0ubuntu13.1.27USN-3680-1
Fixed in:1.3.1-1ubuntu10.24USN-3680-1
Fixed in:4.0.0-1ubuntu8.2USN-3680-1
libvirt-binUbuntu
Fixed in:1.2.2-0ubuntu13.1.27USN-3680-1
Fixed in:1.3.1-1ubuntu10.24USN-3680-1
Fixed in:4.0.0-1ubuntu8.2USN-3680-1
libvirt0Ubuntu
Fixed in:1.2.2-0ubuntu13.1.27USN-3680-1
Fixed in:1.3.1-1ubuntu10.24USN-3680-1
Fixed in:4.0.0-1ubuntu8.2USN-3680-1
linuxUbuntu
Fixed in:3.13.0-149.199USN-3655-1
Fixed in:4.4.0-127.153USN-3654-1
Fixed in:4.15.0-22.24USN-3652-1
linux-awsUbuntu
Fixed in:4.4.0-1022.22USN-3654-2
Fixed in:4.4.0-1060.69USN-3654-1
Fixed in:4.15.0-1009.9USN-3652-1
linux-azureUbuntu
Fixed in:4.13.0-1018.21USN-3653-2
Fixed in:4.15.0-1025.26~16.04.1USN-3777-3
Fixed in:4.15.0-1012.12USN-3652-1
Fixed in:4.15.0-1025.26USN-3777-3
linux-gcpUbuntu
Fixed in:4.13.0-1017.21USN-3653-2
Fixed in:4.15.0-1008.8USN-3652-1
linux-hweUbuntu
Fixed in:4.13.0-43.48~16.04.1USN-3653-2
linux-image-3.13.0-149-genericUbuntu
Fixed in:3.13.0-149.199USN-3655-1
linux-image-3.13.0-149-generic-lpaeUbuntu
Fixed in:3.13.0-149.199USN-3655-1
linux-image-3.13.0-149-lowlatencyUbuntu
Fixed in:3.13.0-149.199USN-3655-1
linux-image-3.13.0-149-powerpc-e500Ubuntu
Fixed in:3.13.0-149.199USN-3655-1
linux-image-3.13.0-149-powerpc-e500mcUbuntu
Fixed in:3.13.0-149.199USN-3655-1
linux-image-3.13.0-149-powerpc-smpUbuntu
Fixed in:3.13.0-149.199USN-3655-1
linux-image-3.13.0-149-powerpc64-embUbuntu
Fixed in:3.13.0-149.199USN-3655-1
linux-image-3.13.0-149-powerpc64-smpUbuntu
Fixed in:3.13.0-149.199USN-3655-1
linux-image-4.13.0-1017-gcpUbuntu
Fixed in:4.13.0-1017.21USN-3653-2
linux-image-4.13.0-1018-azureUbuntu
Fixed in:4.13.0-1018.21USN-3653-2
linux-image-4.13.0-1028-oemUbuntu
Fixed in:4.13.0-1028.31USN-3653-2
linux-image-4.13.0-43-genericUbuntu
Fixed in:4.13.0-43.48~16.04.1USN-3653-2
linux-image-4.13.0-43-generic-lpaeUbuntu
Fixed in:4.13.0-43.48~16.04.1USN-3653-2
linux-image-4.13.0-43-lowlatencyUbuntu
Fixed in:4.13.0-43.48~16.04.1USN-3653-2
linux-image-4.15.0-1008-gcpUbuntu
Fixed in:4.15.0-1008.8USN-3652-1
linux-image-4.15.0-1009-awsUbuntu
Fixed in:4.15.0-1009.9USN-3652-1
linux-image-4.15.0-1010-kvmUbuntu
Fixed in:4.15.0-1010.10USN-3652-1
linux-image-4.15.0-22-genericUbuntu
Fixed in:4.15.0-22.24USN-3652-1
linux-image-4.15.0-22-generic-lpaeUbuntu
Fixed in:4.15.0-22.24USN-3652-1
linux-image-4.15.0-22-lowlatencyUbuntu
Fixed in:4.15.0-22.24USN-3652-1
linux-image-4.4.0-1022-awsUbuntu
Fixed in:4.4.0-1022.22USN-3654-2
linux-image-4.4.0-1026-kvmUbuntu
Fixed in:4.4.0-1026.31USN-3654-1
linux-image-4.4.0-1060-awsUbuntu
Fixed in:4.4.0-1060.69USN-3654-1
linux-image-4.4.0-127-genericUbuntu
Fixed in:4.4.0-127.153~14.04.1USN-3654-2
Fixed in:4.4.0-127.153USN-3654-1
linux-image-4.4.0-127-generic-lpaeUbuntu
Fixed in:4.4.0-127.153~14.04.1USN-3654-2
Fixed in:4.4.0-127.153USN-3654-1
linux-image-4.4.0-127-lowlatencyUbuntu
Fixed in:4.4.0-127.153~14.04.1USN-3654-2
Fixed in:4.4.0-127.153USN-3654-1
linux-image-4.4.0-127-powerpc-e500mcUbuntu
Fixed in:4.4.0-127.153~14.04.1USN-3654-2
Fixed in:4.4.0-127.153USN-3654-1
linux-image-4.4.0-127-powerpc-smpUbuntu
Fixed in:4.4.0-127.153~14.04.1USN-3654-2
Fixed in:4.4.0-127.153USN-3654-1
linux-image-4.4.0-127-powerpc64-embUbuntu
Fixed in:4.4.0-127.153~14.04.1USN-3654-2
Fixed in:4.4.0-127.153USN-3654-1
linux-image-4.4.0-127-powerpc64-smpUbuntu
Fixed in:4.4.0-127.153~14.04.1USN-3654-2
Fixed in:4.4.0-127.153USN-3654-1
linux-kvmUbuntu
Fixed in:4.4.0-1026.31USN-3654-1
Fixed in:4.15.0-1010.10USN-3652-1
linux-lts-xenialUbuntu
Fixed in:4.4.0-127.153~14.04.1USN-3654-2
linux-oemUbuntu
Fixed in:4.13.0-1028.31USN-3653-2
Fixed in:4.15.0-1006.9USN-3652-1
qemuUbuntu
Fixed in:2.0.0+dfsg-2ubuntu1.42USN-3651-1
Fixed in:2.0.0+dfsg-2ubuntu1.43USN-3679-1
Fixed in:1:2.5+dfsg-5ubuntu10.29USN-3651-1
Fixed in:1:2.5+dfsg-5ubuntu10.30USN-3679-1
Fixed in:1:2.11+dfsg-1ubuntu7.2USN-3651-1
Fixed in:1:2.11+dfsg-1ubuntu7.3USN-3679-1
qemu-systemUbuntu
Fixed in:2.0.0+dfsg-2ubuntu1.43USN-3679-1
Fixed in:2.0.0+dfsg-2ubuntu1.42USN-3651-1
Fixed in:1:2.5+dfsg-5ubuntu10.29USN-3651-1
Fixed in:1:2.5+dfsg-5ubuntu10.30USN-3679-1
Fixed in:1:2.11+dfsg-1ubuntu7.2USN-3651-1
Fixed in:1:2.11+dfsg-1ubuntu7.3USN-3679-1
qemu-system-x86Ubuntu
Fixed in:2.0.0+dfsg-2ubuntu1.42USN-3651-1
Fixed in:2.0.0+dfsg-2ubuntu1.43USN-3679-1
Fixed in:1:2.5+dfsg-5ubuntu10.30USN-3679-1
Fixed in:1:2.5+dfsg-5ubuntu10.29USN-3651-1
Fixed in:1:2.11+dfsg-1ubuntu7.3USN-3679-1
Fixed in:1:2.11+dfsg-1ubuntu7.2USN-3651-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityHigh
IntegrityNone
AvailabilityNone

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Exploit Intelligence

60.63%probability of exploitation in 30 days
99thpercentile

Very high risk: more likely to be exploited than 99% of all known CVEs.

References

Third-Party Advisory47

Related Vulnerabilities

Other CWE-203 vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2017-5753Medium5.694%-Fix
CVE-2003-0190Medium5.077%-Fix
CVE-2017-5715Medium5.674%-Fix
CVE-2023-28770High7.558%-Fix
CVE-2004-1602Medium5.031%--
CVE-2017-13099High7.525%-Fix
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-29.