CVE-2023-6856

Summary

CVE-2023-6856 is a critical vulnerability affecting Firefox ESR versions below 115.6, Thunderbird below 115.6, and Firefox below 121. This issue lies in the WebGL `DrawElementsInstanced` method, which is susceptible to a heap buffer overflow when utilized on systems equipped with the Mesa VM driver. An attacker can exploit this vulnerability to execute remote code and escape the sandbox, posing a serious threat to system security.

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