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Date: Thu, 28 Sep 2023 11:37:23 -0700
From: Alan Coopersmith <>
Subject: CVE-2023-5217: Heap buffer overflow in vp8 encoding in libvpx

Google has announced another media parsing bug, this time correctly documenting
both the base library and Chrome versions affected in the CVE. states:

    Heap buffer overflow in vp8 encoding in libvpx in Google Chrome prior to
    117.0.5938.132 and libvpx 1.13.1 allowed a remote attacker to potentially
    exploit heap corruption via a crafted HTML page.
    (Chromium security severity: High)

Unfortunately, the bug report it points to is restricted access still:

But the Chrome release notes state:
    Google is aware that an exploit for CVE-2023-5217 exists in the wild.

Mozilla has put out their own security advisory at
and delivered fixes in Firefox 118.0.1, Firefox ESR 115.3.1,
Firefox Focus for Android 118.1, and Firefox for Android 118.1. is also still
restricted access.

It does not appear that libvpx 1.13.1 has been released yet, but there
are two commits in its git repo with the 1486441 bug id listed:

Mozilla's commit references these two libvpx commit ids as well:

         -Alan Coopersmith-       
          Oracle Solaris Engineering -

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