Mozilla developers reported memory safety bugs present in Firefox 84 and Firefox ESR 78.6. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. External Reference: https://www.mozilla.org/en-US/security/advisories/mfsa2021-04/#CVE-2021-23964
Acknowledgments: Name: the Mozilla project Upstream: Alexis Beingessner, Christian Holler, Andrew McCreight, Tyson Smith, Jon Coppeard, André Bargull, Jason Kratzer, Jesse Schwartzentruber, Steve Fink, Byron Campen
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.1 Extended Update Support Via RHSA-2021:0285 https://access.redhat.com/errata/RHSA-2021:0285
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2021:0288 https://access.redhat.com/errata/RHSA-2021:0288
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.2 Extended Update Support Via RHSA-2021:0289 https://access.redhat.com/errata/RHSA-2021:0289
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2021:0290 https://access.redhat.com/errata/RHSA-2021:0290
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2021-23964
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2021:0297 https://access.redhat.com/errata/RHSA-2021:0297
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2021:0298 https://access.redhat.com/errata/RHSA-2021:0298
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.2 Extended Update Support Via RHSA-2021:0299 https://access.redhat.com/errata/RHSA-2021:0299
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.1 Extended Update Support Via RHSA-2021:0397 https://access.redhat.com/errata/RHSA-2021:0397