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01 Record

CVE-2018-3639

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

MediumPUBLISHEDCNA: intel
CNA base score5.5 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
View raw JSON

02 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

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
60.63% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 99.0% of scored records. A rank, not a probability.
NVD base score
5.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2018-05-22 12:00Z8 YR AGO
Last updated
2026-05-29 20:14Z5 MO AGO
Reserved
2017-12-28
Assigning CNA
intel
Record state
PUBLISHED
Severity
Medium (CVSS 5.5)
CNA CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weaknesses
Data version
5.2
Document digest
05dec95fcb3fcfcb67c0fd2aa4a5b750f8b4b85536d1e725a5b7cd58b6bef4f6

05 Affected products

VendorProductVersionsPlatforms
Intel CorporationMultipleMultiple—

06 References

07 Fixed in

Debian 12

  • arm-trusted-firmware
    No fix yet
  • intel-microcode
    Fixed in 3.20180703.1
  • linux
    Fixed in 4.16.12-1
  • xen
    Fixed in 4.8.3+xsa262+shim4.10.0+comet3-1+deb9u7

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • arm-trusted-firmware
    No fix yet
  • intel-microcode
    Fixed in 3.20180703.1
  • linux
    Fixed in 4.16.12-1
  • xen
    Fixed in 4.8.3+xsa262+shim4.10.0+comet3-1+deb9u7

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • arm-trusted-firmware
    Fixed in 2.12.16+dfsg-1
  • intel-microcode
    Fixed in 3.20180703.1
  • linux
    Fixed in 4.16.12-1
  • xen
    Fixed in 4.8.3+xsa262+shim4.10.0+comet3-1+deb9u7

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 14.04 LTS

  • intel-microcode
    Fixed in 3.20180807a.0ubuntu0.14.04.1
  • libvirt
    Fixed in 1.2.2-0ubuntu13.1.27
  • linux
    Fixed in 3.13.0-149.199
  • linux-aws
    Fixed in 4.4.0-1022.22
  • linux-lts-xenial
    Fixed in 4.4.0-127.153~14.04.1
  • qemu
    Fixed in 2.0.0+dfsg-2ubuntu1.42

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 16.04 LTS

  • intel-microcode
    Fixed in 3.20180807a.0ubuntu0.16.04.1
  • libvirt
    Fixed in 1.3.1-1ubuntu10.24
  • linux
    Fixed in 4.4.0-127.153
  • linux-aws
    Fixed in 4.4.0-1060.69
  • linux-azure
    Fixed in 4.13.0-1018.21
  • linux-gcp
    Fixed in 4.13.0-1017.21
  • linux-hwe
    Fixed in 4.13.0-43.48~16.04.1
  • linux-kvm
    Fixed in 4.4.0-1026.31
  • linux-oem
    Fixed in 4.13.0-1028.31
  • linux-raspi2
    Fixed in 4.4.0-1091.99
  • linux-snapdragon
    Fixed in 4.4.0-1094.99
  • qemu
    Fixed in 1:2.5+dfsg-5ubuntu10.29
  • xen
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 18.04 LTS

  • intel-microcode
    Fixed in 3.20180807a.0ubuntu0.18.04.1
  • libvirt
    Fixed in 4.0.0-1ubuntu8.2
  • linux
    Fixed in 4.15.0-22.24
  • linux-aws
    Fixed in 4.15.0-1009.9
  • linux-azure
    Fixed in 4.15.0-1012.12
  • linux-gcp
    Fixed in 4.15.0-1008.8
  • linux-kvm
    Fixed in 4.15.0-1010.10
  • linux-oem
    Fixed in 4.15.0-1006.9
  • linux-raspi2
    Fixed in 4.15.0-1012.13
  • linux-snapdragon
    Fixed in 4.15.0-1053.57
  • qemu
    Fixed in 1:2.11+dfsg-1ubuntu7.2

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 22.04 LTS

  • linux-intel-iot-realtime
    No fix yet
  • linux-realtime
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 24.04 LTS

  • linux-raspi-realtime
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 20.04 LTS

  • linux-azure-fde-5.15
    Fixed in 5.15.0-1114.123~20.04.1
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro FIPS-updates 16.04 LTS

  • linux-fips
    Fixed in 4.4.0-1008.10
    Available with Ubuntu Pro: https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.