Microsoft Releases Windows 10 Cumulative Updates KB4515384, KB4512578, KB4516058

  • Microsoft has released a new set of cumulative updates for Windows 10 devices as part of the September 2019 Patch Tuesday rollout.

    All Windows 10 versions are getting patched, albeit it’s important to note that only the April 2018 Update and newer are supported for Home and Pro SKUs. The rest of the versions continue to receive updates either for Education and Enterprise or for devices in the LTSC.

    Given they are shipped on a Patch Tuesday, the focus for these cumulative updates is fixing security vulnerabilities, but at the same time, there are also non-security improvements that will come in very handy for Windows 10 users.

    As it’s the case of every other Patch Tuesday rollout, users are recommended to install these updates as soon as possible, especially considering the security patches they bring. At the time of writing this article we aren’t aware of any failed installs or issues caused by these new updates.
    "Critical security fixes"

    The full list of cumulative updates shipped today is this:
    Windows 10 version 1507 — KB4516070 (OS Build 10240.18333)
    Windows 10 version 1607 — KB4516044 (OS Build 14393.3204)
    Windows 10 version 1703 — KB4516068 (OS Build 15063.2045)
    Windows 10 version 1709 — KB4516066 (OS Build 16299.1387)
    Windows 10 version 1803 — KB4516058 (OS Build 17134.1006)
    Windows 10 version 1809 — KB4512578 (OS Build 17763.737)
    Windows 10 version 1903 — KB4515384 (OS Build 18362.356)

    One particular change that users should have in mind concerns speculative execution side-channel vulnerabilities, which Microsoft has been patching for several months already. The software giant explains in the changelog:

    “Provides protections against a new subclass of speculative execution side-channel vulnerabilities, known as Microarchitectural Data Sampling, for 32-Bit (x86) versions of Windows (CVE-2019-11091, CVE-2018-12126, CVE-2018-12127, CVE-2018-12130). Use the registry settings as described in the Windows Client and Windows Server articles. (These registry settings are enabled by default for Windows Client OS editions and Windows Server OS editions.)”

    Security fixes aimed at Internet Explorer, Microsoft Edge, Windows Media, Windows Wireless Networking, and other Windows components are also available.