KLA12303
Multiple vulnerabilities in Mozilla Firefox

Multiple vulnerabilities were found in Mozilla Firefox. Malicious users can exploit these vulnerabilities to execute arbitrary code, cause denial of service, obtain sensitive information, spoof user interface.

Below is a complete list of vulnerabilities:

1. A memory safety vulnerability can be exploited to execute arbitrary code.
2. An use after free vulnerability in MessageTask can be exploited to cause denial of service.
3. A data race vulnerability in crossbeam-deque can be exploited to obtain sensitive information.
4. A security UI vulnerability in message validation can be exploited to spoof user interface.
5. An use after free vulnerability in nsLanguageAtomService object can be exploited to cause denial of service.
6. An use after free vulnerability in HTTP2 Session object can be exploited to cause denial of service.

Mozilla Firefox earlier than 93

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MFSA2021-43