The vulnerability in the `FeatureRef::applyValToFeature` function of the Graphite font library in browsers such as Firefox, Firefox ESR, and the email client Thunderbird allows a hacker to trigger a service failure.

The vulnerability of the FeatureRef::applyValToFeature function in the Graphite font library for browsers Firefox, Firefox ESR, and the email client Thunderbird is related to memory buffer overflow attacks. Exploiting this vulnerability could allow a malicious actor to cause service interruptions...