A use-after-free vulnerability can occur while parsing an HTML5 stream in concert with custom HTML elements. This results in the stream parser object being freed while still in use, leading to a potentially exploitable crash. External Reference: https://www.mozilla.org/en-US/security/advisories/mfsa2019-02/#CVE-2018-18500
Acknowledgments: Name: the Mozilla project Upstream: Yaniv Frank (SophosLabs)
This issue has been addressed in the following products: Red Hat Enterprise Linux 6 Via RHSA-2019:0218 https://access.redhat.com/errata/RHSA-2019:0218
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2019:0219 https://access.redhat.com/errata/RHSA-2019:0219
This issue has been addressed in the following products: Red Hat Enterprise Linux 6 Via RHSA-2019:0269 https://access.redhat.com/errata/RHSA-2019:0269
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2019:0270 https://access.redhat.com/errata/RHSA-2019:0270