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No exploitation reportedFix available

CVE-2018-3646

No exploitation reported by the sources we read.

  • Published2018-08-14
  • WeaknessCWE-200

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Systems with microprocessors utilizing speculative execution and address translations may allow unauthorized disclosure of information residing in the L1 data cache to an attacker with local user access with guest OS privilege via a terminal page fault and a side-channel analysis.

Timeline

dates in UTC
  1. 2018-08-1419:29CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2018-3646?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2018-3646?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Intel core i3
BranchAffectedFixed in
330.x= 330eno fix published
330.x= 330mno fix published
330.x= 330umno fix published
350.x= 350mno fix published
370.x= 370mno fix published
380.x= 380mno fix published
380.x= 380umno fix published
390.x= 390mno fix published
530.x= 530no fix published
540.x= 540no fix published
550.x= 550no fix published
560.x= 560no fix published
Intel core i5
BranchAffectedFixed in
430.x= 430mno fix published
430.x= 430umno fix published
450.x= 450mno fix published
460.x= 460mno fix published
470.x= 470umno fix published
480.x= 480mno fix published
520.x= 520eno fix published
520.x= 520mno fix published
520.x= 520umno fix published
540.x= 540mno fix published
540.x= 540umno fix published
560.x= 560mno fix published
Intel core i7
BranchAffectedFixed in
7.x= 7y75no fix published
610.x= 610eno fix published
620.x= 620leno fix published
620.x= 620lmno fix published
620.x= 620mno fix published
620.x= 620ueno fix published
620.x= 620umno fix published
640.x= 640lmno fix published
640.x= 640mno fix published
640.x= 640umno fix published
660.x= 660lmno fix published
660.x= 660ueno fix published

5 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As intel, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Intel Corporation Multiple
    Affected
    • = Multipleno fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2020-07-15

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • dpdkSUSE:Linux Enterprise Software Development Kit 12 SP3all versions · fixed in 16.11.6-8.7.2and 1 other package
  • dpdkSUSE:Linux Enterprise Server for SAP Applications 12 SP3all versions · fixed in 16.11.6-8.7.2and 1 other package
  • dpdkSUSE:Linux Enterprise Server 12 SP3all versions · fixed in 16.11.6-8.7.2and 1 other package
  • intel-microcodeUbuntu:18.04:LTSall versions · fixed in 3.20180807a.0ubuntu0.18.04.1
  • intel-microcodeUbuntu:16.04:LTSall versions · fixed in 3.20180807a.0ubuntu0.16.04.1
  • intel-microcodeUbuntu:14.04:LTSall versions · fixed in 3.20180807a.0ubuntu0.14.04.1
  • intel-microcodeDebian:14all versions · fixed in 3.20180703.1
  • intel-microcodeDebian:13all versions · fixed in 3.20180703.1

230 more package ranges on OSV.dev

Vendor advisories

  • RHSA-2018:2395 Red Hat Product Security26 products fixed

    Red Hat Security Advisory: kernel-rt security and bug fix update

  • RHSA-2018:2384 Red Hat Product Security202 products fixed

    Red Hat Security Advisory: kernel security and bug fix update

  • RHSA-2018:2390 Red Hat Product Security180 products fixed

    Red Hat Security Advisory: kernel security and bug fix update

Full record on NVD

Fix

  1. Vendor fix Red Hat Product Security RHSA-2018:2395 · 26 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Published
2018-08-14
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-qj7r-58vw-6www

Frequently asked questions

What is CVE-2018-3646?

Systems with microprocessors utilizing speculative execution and address translations may allow unauthorized disclosure of information residing in the L1 data cache to an attacker with local user access with guest OS privilege via a terminal page fault and a side-channel analysis.

Is CVE-2018-3646 actively exploited?

Active exploitation of CVE-2018-3646 has not been confirmed. Its EPSS score was 8.1% on 2026-11-03, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-3646?

CVE-2018-3646 has a CVSS v3 base score of 5.6 (MEDIUM severity), with vector string CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N.

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Sources for this record