CVE-2019-1125: Microsoft Windows 10

Medium severity, CVSS 5.6. EPSS: 4.5% chance of exploitation in the next 30 days.

An information disclosure vulnerability exists when certain central processing units (CPU) speculatively access memory. An attacker who successfully exploited the vulnerability could read privileged data across trust boundaries. To exploit this vulnerability, an attacker would have to log on to an affected system and run a specially crafted application. The vulnerability would not allow an attacker to elevate user rights directly, but it could be used to obtain information that could be used to try to compromise the affected system further. On January 3, 2018, Microsoft released an advisory and security updates related to a newly-discovered class of hardware vulnerabilities (known as Spectre) involving speculative execution side channels that affect AMD, ARM, and Intel CPUs to varying degrees. This vulnerability, released on August 6, 2019, is a variant of the Spectre Variant 1 speculative execution side channel vulnerability and has been assigned CVE-2019-1125. Microsoft released a security update on July 9, 2019 that addresses the vulnerability through a software change that mitigates how the CPU speculatively accesses memory. Note that this vulnerability does not require a microcode update from your device OEM.

Affected products

  • Microsoft Windows 10: affected versions not specified; version 1607 only; version 1703 only; version 1709 only; version 1803 only; version 1809 only; …
  • Microsoft Windows 7: affected versions not specified
  • Microsoft Windows 8.1: affected versions not specified
  • Microsoft Windows Rt 8.1: affected versions not specified
  • Microsoft Windows Server 2008: affected versions not specified; version r2 only
  • Microsoft Windows Server 2012: affected versions not specified; version r2 only
  • Microsoft Windows Server 2016: affected versions not specified; version 1803 only; version 1903 only
  • Microsoft Windows Server 2019: affected versions not specified
  • Red Hat Enterprise Linux Desktop: version 7.0 only
  • Red Hat Enterprise Linux Server: version 7.0 only
  • Red Hat Enterprise Linux Server Aus: version 7.7 only
  • Red Hat Enterprise Linux Server Eus: version 7.7 only
  • Red Hat Enterprise Linux Server Tus: version 7.7 only
  • Red Hat Enterprise Linux Workstation: version 7.0 only
  • Red Hat Virtualization Host: version 4.0 only

Published 2019-09-03. Last modified 2026-06-17.