An insufficient data validation flaw was found in the Flash component of the Chromium browser.
Created chromium tracking bugs for this issue:
Affects: epel-all [bug 1899248]
Affects: fedora-all [bug 1899247]
This is actually an Adobe Flash flaw, covered by the Adobe Security Bulletin APSB19-30:
Same Origin Policy Bypass Information Disclosure Important CVE-2019-8075
This CVE was not listed in the Adobe bulletin at the time it was published, but - according to the Revisions information in the bulletin - was only added more than 3 months later. The update for flash-plugin packages in Red Hat Enterprise Linux 6 Supplementary which provided fixed version 188.8.131.52 was released in Jun 2019 as RHSA-2019:1476:
The versions of the Chromium browser as included in Red Hat Enterprise Linux 6 Supplementary or Fedora do not include Adobe Flash and hence can not be affected by this issue. This probably got fixed in Chrome before the version 87.0.4280.66 when the bundled Flash version was updated to a fixed Adobe version, it only did not get acknowledged in any Chrome release announcement.
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):