Modification of specific WebGL shader attributes could trigger an out-of-bounds read, which, when chained with other vulnerabilities, could be used to escalate privileges. *This bug only affects Firefox for macOS. Other versions of Firefox are unaffected.* This vulnerability affects Firefox < 138, Firefox ESR < 128.10, Firefox ESR < 115.23, Thunderbird < 138, and Thunderbird ESR < 128.10.
https://www.mozilla.org/security/advisories/mfsa2025-32/
https://www.mozilla.org/security/advisories/mfsa2025-31/
https://www.mozilla.org/security/advisories/mfsa2025-30/
https://www.mozilla.org/security/advisories/mfsa2025-29/