The vulnerability of the Firefox browser, which allows a malicious attacker to execute arbitrary code or trigger a service denial.

Mozilla Firefox’s software contains a vulnerability in the nsHostResolver::ConditionalRefreshRecord function. Exploiting this vulnerability allows an attacker to execute arbitrary code or cause a service failure by manipulating server permissions...

Use-after-free in nsHostResolver — Mozilla

Security researchers Tyson Smith and Jesse Schwartzentruber of the BlackBerry Security Automated Analysis Team used the Address Sanitizer tool while fuzzing to discover a use-after-free during host resolution in some circumstances. This leads to a potentially exploitable crash...