01 Record

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

MediumPUBLISHEDCNA: intel

CNA base score5.6 CVSS v3.xCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N

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02 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

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

8.10% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 94.4% of scored records. A rank, not a probability.

NVD base score

5.6 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/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

2018-08-14 19:00Z8 YR AGO

Last updated

2026-05-29 20:10Z3 MO AGO

Reserved

2017-12-28

Assigning CNA

intel

Record state

PUBLISHED

Severity

Medium (CVSS 5.6)

CNA CVSS vector

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

Weaknesses

CWE-200Exposure of Sensitive Information to an Unauthorized ActorClass
CWE-524Use of Cache Containing Sensitive InformationBase

Data version

5.2

Document digest

f02cac6a5bb030f137dfcce146c9c601c2ef7a13ed98ffd5bd8d1cb50b438479

05 Affected products

VendorProductVersionsPlatforms

Intel CorporationMultipleMultiple—

06 References

www.kb.cert.orgVU#982149https://www.kb.cert.org/vuls/id/982149third-party-advisoryx_refsource_CERT-VN
www.securitytracker.com1041451http://www.securitytracker.com/id/1041451vdb-entryx_refsource_SECTRACK
security.gentoo.orgGLSA-201810-06https://security.gentoo.org/glsa/201810-06vendor-advisoryx_refsource_GENTOO
usn.ubuntu.comUSN-3741-2https://usn.ubuntu.com/3741-2/vendor-advisoryx_refsource_UBUNTU
access.redhat.comRHSA-2018:2393https://access.redhat.com/errata/RHSA-2018:2393vendor-advisoryx_refsource_REDHAT
usn.ubuntu.comUSN-3823-1https://usn.ubuntu.com/3823-1/vendor-advisoryx_refsource_UBUNTU
access.redhat.comRHSA-2018:2389https://access.redhat.com/errata/RHSA-2018:2389vendor-advisoryx_refsource_REDHAT
www.securitytracker.com1042004http://www.securitytracker.com/id/1042004vdb-entryx_refsource_SECTRACK
access.redhat.comRHSA-2018:2390https://access.redhat.com/errata/RHSA-2018:2390vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2018:2403https://access.redhat.com/errata/RHSA-2018:2403vendor-advisoryx_refsource_REDHAT
www.securityfocus.com105080http://www.securityfocus.com/bid/105080vdb-entryx_refsource_BID
access.redhat.comRHSA-2018:2395https://access.redhat.com/errata/RHSA-2018:2395vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2018:2384https://access.redhat.com/errata/RHSA-2018:2384vendor-advisoryx_refsource_REDHAT
usn.ubuntu.comUSN-3740-2https://usn.ubuntu.com/3740-2/vendor-advisoryx_refsource_UBUNTU
security.freebsd.orgFreeBSD-SA-18:09https://security.FreeBSD.org/advisories/FreeBSD-SA-18:09.l1tf.ascvendor-advisoryx_refsource_FREEBSD
www.debian.orgDSA-4274https://www.debian.org/security/2018/dsa-4274vendor-advisoryx_refsource_DEBIAN
lists.fedoraproject.orgFEDORA-2018-1c80fea1cdhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XRFKQWYV2H4BV75CUNGCGE5TNVQCLBGZ/vendor-advisoryx_refsource_FEDORA
access.redhat.comRHSA-2018:2388https://access.redhat.com/errata/RHSA-2018:2388vendor-advisoryx_refsource_REDHAT
usn.ubuntu.comUSN-3741-1https://usn.ubuntu.com/3741-1/vendor-advisoryx_refsource_UBUNTU
access.redhat.comRHSA-2018:2603https://access.redhat.com/errata/RHSA-2018:2603vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2018:2402https://access.redhat.com/errata/RHSA-2018:2402vendor-advisoryx_refsource_REDHAT
tools.cisco.com20180814 CPU Side-Channel Information Disclosure Vulnerabilities: August 2018https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180814-cpusidechannelvendor-advisoryx_refsource_CISCO
lists.fedoraproject.orgFEDORA-2018-f8cba144aehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V4UWGORQWCENCIF2BHWUEF2ODBV75QS2/vendor-advisoryx_refsource_FEDORA
usn.ubuntu.comUSN-3742-2https://usn.ubuntu.com/3742-2/vendor-advisoryx_refsource_UBUNTU
access.redhat.comRHSA-2018:2404https://access.redhat.com/errata/RHSA-2018:2404vendor-advisoryx_refsource_REDHAT
usn.ubuntu.comUSN-3740-1https://usn.ubuntu.com/3740-1/vendor-advisoryx_refsource_UBUNTU
access.redhat.comRHSA-2018:2391https://access.redhat.com/errata/RHSA-2018:2391vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2018:2396https://access.redhat.com/errata/RHSA-2018:2396vendor-advisoryx_refsource_REDHAT
www.debian.orgDSA-4279https://www.debian.org/security/2018/dsa-4279vendor-advisoryx_refsource_DEBIAN
access.redhat.comRHSA-2018:2392https://access.redhat.com/errata/RHSA-2018:2392vendor-advisoryx_refsource_REDHAT
lists.debian.org[debian-lts-announce] 20180828 [SECURITY] [DLA 1481-1] linux-4.9 security updatehttps://lists.debian.org/debian-lts-announce/2018/08/msg00029.htmlmailing-listx_refsource_MLIST
usn.ubuntu.comUSN-3742-1https://usn.ubuntu.com/3742-1/vendor-advisoryx_refsource_UBUNTU
access.redhat.comRHSA-2018:2602https://access.redhat.com/errata/RHSA-2018:2602vendor-advisoryx_refsource_REDHAT
lists.debian.org[debian-lts-announce] 20180916 [SECURITY] [DLA 1506-1] intel-microcode security updatehttps://lists.debian.org/debian-lts-announce/2018/09/msg00017.htmlmailing-listx_refsource_MLIST
access.redhat.comRHSA-2018:2394https://access.redhat.com/errata/RHSA-2018:2394vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2018:2387https://access.redhat.com/errata/RHSA-2018:2387vendor-advisoryx_refsource_REDHAT
usn.ubuntu.comUSN-3756-1https://usn.ubuntu.com/3756-1/vendor-advisoryx_refsource_UBUNTU
www.oracle.comhttps://www.oracle.com/security-alerts/cpujul2020.htmlx_refsource_MISC
www.oracle.comhttps://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.htmlx_refsource_CONFIRM
www.oracle.comhttps://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.htmlx_refsource_MISC
help.ecostruxureit.comhttps://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0x_refsource_CONFIRM
xenbits.xen.orghttp://xenbits.xen.org/xsa/advisory-273.htmlx_refsource_CONFIRM
foreshadowattack.euhttps://foreshadowattack.eu/x_refsource_MISC
security.netapp.comhttps://security.netapp.com/advisory/ntap-20180815-0001/x_refsource_CONFIRM
portal.msrc.microsoft.comhttps://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV180018x_refsource_CONFIRM
support.lenovo.comhttp://support.lenovo.com/us/en/solutions/LEN-24163x_refsource_CONFIRM
www.huawei.comhttp://www.huawei.com/en/psirt/security-advisories/huawei-sa-20180815-01-cpu-enx_refsource_CONFIRM
www.intel.comhttps://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00161.htmlx_refsource_CONFIRM
www.synology.comhttps://www.synology.com/support/security/Synology_SA_18_45x_refsource_CONFIRM
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/pdf/ssa-254686.pdfx_refsource_CONFIRM
support.hpe.comhttps://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03874en_usx_refsource_CONFIRM
software.intel.comhttps://software.intel.com/security-software-guidance/software-guidance/l1-terminal-faultx_refsource_CONFIRM
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/pdf/ssa-608355.pdfx_refsource_CONFIRM
psirt.global.sonicwall.comhttps://psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0010x_refsource_CONFIRM
www.vmware.comhttp://www.vmware.com/security/advisories/VMSA-2018-0020.htmlx_refsource_CONFIRM
support.f5.comhttps://support.f5.com/csp/article/K31300402x_refsource_CONFIRM

01 Record index

CVE-2018-3646

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2018-3646

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References