Systems with microprocessors utilizing speculative execution and speculative execution of memory reads before the addresses of all prior…

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.

Scores

EPSS (exploitation in 30 days)

60.4% · top 0.9% of all CVEs (4 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.

Weakness

• Information Disclosure
• CWE-203 Observable Discrepancy (opens in a new tab)All about CWE-203 and its CVEs

Affected products

• Intel Corporation · Multiple

  • affected Multiple

References (147)

• RHSA-2018:1689 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:2162 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1641 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• USN-3680-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• RHSA-2018:1997 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1665 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:3407 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:2164 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:2001 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:3423 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:2003 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• USN-3654-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• RHSA-2018:1645 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1643 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1652 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:3424 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:3402 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• TA18-141A (opens in a new tab)third-party-advisoryx_refsource_CERTx_transferred
• RHSA-2018:1656 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1664 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:2258 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1688 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1658 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1657 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:2289 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1666 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• 1042004 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
• RHSA-2018:1675 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1660 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1965 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1661 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1633 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1636 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1854 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:2006 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:2250 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• 1040949 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
• RHSA-2018:3401 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1737 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1826 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• USN-3651-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• DSA-4210 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
• 44695 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
• RHSA-2018:1651 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1638 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1696 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:2246 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1644 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1646 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• [debian-lts-announce] 20180718 [SECURITY] [DLA 1423-1] linux-4.9 new package (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• RHSA-2018:1639 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1668 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1637 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:2948 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• VU#180049 (opens in a new tab)third-party-advisoryx_refsource_CERT-VNx_transferred
• RHSA-2018:1686 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:2172 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1663 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• USN-3652-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• RHSA-2018:1629 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1655 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1640 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1669 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1676 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• 20180522 CPU Side-Channel Information Disclosure Vulnerabilities: May 2018 (opens in a new tab)vendor-advisoryx_refsource_CISCOx_transferred
• RHSA-2018:3425 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:2363 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1632 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1650 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:2396 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:2364 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• USN-3653-2 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• RHSA-2018:2216 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• USN-3655-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• RHSA-2018:1649 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:2309 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• 104232 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• RHSA-2018:1653 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:2171 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1635 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• [debian-lts-announce] 20180916 [SECURITY] [DLA 1506-1] intel-microcode security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• RHSA-2018:2394 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1710 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1659 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1711 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• DSA-4273 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
• RHSA-2018:1738 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1674 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:3396 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1667 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• USN-3654-2 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• RHSA-2018:1662 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1630 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1647 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1967 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• USN-3655-2 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• RHSA-2018:3399 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:2060 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1690 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• USN-3653-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• RHSA-2018:2161 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• [debian-lts-announce] 20180727 [SECURITY] [DLA 1446-1] intel-microcode security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• RHSA-2018:2328 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1648 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:2387 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2019:0148 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:1654 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• USN-3679-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• USN-3777-3 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• RHSA-2018:1642 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:3397 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• [debian-lts-announce] 20190315 [SECURITY] [DLA 1715-1] linux-4.9 security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• USN-3756-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• RHSA-2018:3398 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:3400 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:2228 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• [debian-lts-announce] 20190327 [SECURITY] [DLA 1731-1] linux security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [debian-lts-announce] 20190401 [SECURITY] [DLA 1731-2] linux regression update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• RHSA-2019:1046 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• openSUSE-SU-2019:1439 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• openSUSE-SU-2019:1438 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• 20190624 [SECURITY] [DSA 4469-1] libvirt security update (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
• [oss-security] 20200610 kernel: Multiple SSBD related flaws CVE-2020-10766 , CVE-2020-10767, CVE-2020-10768 (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [oss-security] 20200610 Re: kernel: Multiple SSBD related flaws CVE-2020-10766 , CVE-2020-10767, CVE-2020-10768 (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [oss-security] 20200610 Re: kernel: Multiple SSBD related flaws CVE-2020-10766 , CVE-2020-10767, CVE-2020-10768 (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• https://www.oracle.com/security-alerts/cpujul2020.html (opens in a new tab)x_refsource_MISCx_transferred
• https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0 (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://cert-portal.siemens.com/productcert/pdf/ssa-608355.pdf (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://cert-portal.siemens.com/productcert/pdf/ssa-268644.pdf (opens in a new tab)x_refsource_CONFIRMx_transferred
• http://support.lenovo.com/us/en/solutions/LEN-22133 (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0004 (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV180012 (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://support.citrix.com/article/CTX235225 (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00115.html (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://www.synology.com/support/security/Synology_SA_18_23 (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability (opens in a new tab)x_refsource_CONFIRMx_transferred
• http://www.fujitsu.com/global/support/products/software/security/products-f/cve-2018-3639e.html (opens in a new tab)x_refsource_CONFIRMx_transferred
• http://xenbits.xen.org/xsa/advisory-263.html (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://cert-portal.siemens.com/productcert/pdf/ssa-505225.pdf (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://www.mitel.com/en-ca/support/security-advisories/mitel-product-security-advisory-18-0006 (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03850en_us (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://bugs.chromium.org/p/project-zero/issues/detail?id=1528 (opens in a new tab)x_refsource_MISCx_transferred
• https://security.netapp.com/advisory/ntap-20180521-0001/ (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://nvidia.custhelp.com/app/answers/detail/a_id/4787 (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://support.oracle.com/knowledge/Sun%20Microsystems/2481872_1.html (opens in a new tab)x_refsource_CONFIRMx_transferred
• openSUSE-SU-2020:1325 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2018-3639](https://trackcve.app/badge/CVE-2018-3639.svg)](https://trackcve.app/cve/CVE-2018-3639)

Record last updated 29 May 2026, 20:14 UTC.