OpenBSD Errata: August 9th, 2019 (swapgs)

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OpenBSD Errata: August 9th, 2019 (swapgs)

T.J. Townsend
Errata patches for the kernel have been released for OpenBSD 6.4 and 6.5.

Intel CPUs have another cross privilege side-channel attack. (SWAPGS)

Binary updates for the amd64 platform are available via the syspatch utility.
Source code patches can be found on the respective errata page:

  https://www.openbsd.org/errata64.html
  https://www.openbsd.org/errata65.html

As these affect the kernel, a reboot will be needed after patching.