Due to large allocation checks in Angle for glsl shaders being too lenient a buffer overflow could have occured when allocating too much private shader memory on mac OS. *This bug only affects Firefox on macOS. Other operating systems are unaffected.* This vulnerability affects Firefox < 117, Firefox ESR < 115.2, and Thunderbird < 115.2.
https://www.mozilla.org/security/advisories/mfsa2023-38/
https://www.mozilla.org/security/advisories/mfsa2023-36/