CVE-2018-3665

CVE-2018-3665 is a medium-severity vulnerability in Intel Core I3 with a CVSS 3.x base score of 5.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.

Key facts

• Severity: Medium (CVSS 3.x base score 5.6)
• CVSS v2: 4.7
• EPSS exploit prediction: 1% (45th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-200
• Affected product: Intel Core I3
• Published: 2018-06-21
• Last modified: 2026-06-17

Description

System software utilizing Lazy FP state restore technique on systems using Intel Core-based microprocessors may potentially allow a local process to infer data from another process through a speculative execution side channel.

Frequently asked questions

What is CVE-2018-3665?

System software utilizing Lazy FP state restore technique on systems using Intel Core-based microprocessors may potentially allow a local process to infer data from another process through a speculative execution side channel.

How severe is CVE-2018-3665?

CVE-2018-3665 has a CVSS 3.x base score of 5.6, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2018-3665 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-3665?

CVE-2018-3665 primarily affects Intel Core I3. In total, 481 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-3665?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-3665 published?

CVE-2018-3665 was published on 2018-06-21 and last updated on 2026-06-17.

References

• http://www.securityfocus.com/bid/104460
• http://www.securitytracker.com/id/1041124
• http://www.securitytracker.com/id/1041125
• https://access.redhat.com/errata/RHSA-2018:1852
• https://access.redhat.com/errata/RHSA-2018:1944
• https://access.redhat.com/errata/RHSA-2018:2164
• https://access.redhat.com/errata/RHSA-2018:2165
• https://access.redhat.com/errata/RHSA-2019:1170
• https://access.redhat.com/errata/RHSA-2019:1190
• https://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0
• https://lists.debian.org/debian-lts-announce/2018/07/msg00015.html
• https://lists.debian.org/debian-lts-announce/2018/07/msg00016.html
• https://nvidia.custhelp.com/app/answers/detail/a_id/4787
• https://security.FreeBSD.org/advisories/FreeBSD-SA-18:07.lazyfpu.asc
• https://security.netapp.com/advisory/ntap-20181016-0001/
• https://security.paloaltonetworks.com/CVE-2018-3665
• https://support.citrix.com/article/CTX235745
• https://usn.ubuntu.com/3696-1/
• https://usn.ubuntu.com/3696-2/
• https://usn.ubuntu.com/3698-1/
• https://usn.ubuntu.com/3698-2/
• https://www.debian.org/security/2018/dsa-4232
• https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00145.html
• https://www.oracle.com/security-alerts/cpujul2020.html
• https://www.synology.com/support/security/Synology_SA_18_31

Affected products (481)

• cpe:2.3:h:intel:core_i3:330e:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:330m:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:330um:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:350m:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:370m:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:380m:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:380um:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:390m:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:530:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:540:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:550:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:560:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:2100:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:2100t:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:2102:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:2105:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:2115c:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:2120:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:2120t:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:2125:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:2130:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:2310e:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:2310m:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:2312m:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:2328m:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:2330e:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:2330m:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:2340ue:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:2348m:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:2350m:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:2357m:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:2365m:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:2367m:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:2370m:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:2375m:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:2377m:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:3110m:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:3115c:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:3120m:*:*:*:*:*:*:*
• cpe:2.3:h:intel:core_i3:3120me:*:*:*:*:*:*:*

More vulnerabilities in Intel Core I3

• CVE-2018-12169 — High (CVSS 7.6): Platform sample code firmware in 4th Generation Intel Core Processor, 5th Generation Intel Core Processor, 6th…
• CVE-2018-3615 — High (CVSS 7.3): Systems with microprocessors utilizing speculative execution and Intel software guard extensions (Intel SGX) may allow…
• CVE-2017-5704 — Medium (CVSS 6.7): Platform sample code firmware included with 4th Gen Intel Core Processor, 5th Gen Intel Core Processor, 6th Gen Intel…
• CVE-2018-3646 — Medium (CVSS 5.6): Systems with microprocessors utilizing speculative execution and address translations may allow unauthorized disclosure…
• CVE-2018-3620 — Medium (CVSS 5.6): Systems with microprocessors utilizing speculative execution and address translations may allow unauthorized disclosure…
• CVE-2018-3693 — Medium (CVSS 5.6): Systems with microprocessors utilizing speculative execution and branch prediction may allow unauthorized disclosure of…

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