CVE ID:	CVE-2023-4578
Description:	When calling `JS::CheckRegExpSyntax` a Syntax Error could have been set which would end in calling `convertToRuntimeErrorAndClear`. A path in the function could attempt to allocate memory when none is available which would have caused a newly created Out of Memory exception to be mishandled as a Syntax Error. This vulnerability affects Firefox < 117, Firefox ESR < 115.2, and Thunderbird < 115.2.
Test IDs:	None available
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2023-4578 https://bugzilla.mozilla.org/show_bug.cgi?id=1839007 https://bugzilla.mozilla.org/show_bug.cgi?id=1839007 https://www.mozilla.org/security/advisories/mfsa2023-34/ https://www.mozilla.org/security/advisories/mfsa2023-34/ https://www.mozilla.org/security/advisories/mfsa2023-36/ https://www.mozilla.org/security/advisories/mfsa2023-36/ https://www.mozilla.org/security/advisories/mfsa2023-38/ https://www.mozilla.org/security/advisories/mfsa2023-38/