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.
{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "117.0+build2-0ubuntu0.20.04.1",
            "binary_name": "firefox"
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            "binary_version": "117.0+build2-0ubuntu0.20.04.1",
            "binary_name": "firefox-dev"
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            "binary_version": "117.0+build2-0ubuntu0.20.04.1",
            "binary_name": "firefox-geckodriver"
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        {
            "binary_version": "117.0+build2-0ubuntu0.20.04.1",
            "binary_name": "firefox-mozsymbols"
        }
    ]
}{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "1:115.3.1+build1-0ubuntu0.20.04.1",
            "binary_name": "thunderbird"
        },
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            "binary_name": "thunderbird-dev"
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            "binary_version": "1:115.3.1+build1-0ubuntu0.20.04.1",
            "binary_name": "thunderbird-gnome-support"
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            "binary_version": "1:115.3.1+build1-0ubuntu0.20.04.1",
            "binary_name": "thunderbird-mozsymbols"
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            "binary_version": "1:115.3.1+build1-0ubuntu0.20.04.1",
            "binary_name": "xul-ext-calendar-timezones"
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            "binary_version": "1:115.3.1+build1-0ubuntu0.20.04.1",
            "binary_name": "xul-ext-gdata-provider"
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            "binary_version": "1:115.3.1+build1-0ubuntu0.20.04.1",
            "binary_name": "xul-ext-lightning"
        }
    ]
}{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "1:115.3.1+build1-0ubuntu0.22.04.2",
            "binary_name": "thunderbird"
        },
        {
            "binary_version": "1:115.3.1+build1-0ubuntu0.22.04.2",
            "binary_name": "thunderbird-dev"
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            "binary_version": "1:115.3.1+build1-0ubuntu0.22.04.2",
            "binary_name": "thunderbird-gnome-support"
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            "binary_version": "1:115.3.1+build1-0ubuntu0.22.04.2",
            "binary_name": "thunderbird-mozsymbols"
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            "binary_version": "1:115.3.1+build1-0ubuntu0.22.04.2",
            "binary_name": "xul-ext-calendar-timezones"
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            "binary_version": "1:115.3.1+build1-0ubuntu0.22.04.2",
            "binary_name": "xul-ext-gdata-provider"
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            "binary_version": "1:115.3.1+build1-0ubuntu0.22.04.2",
            "binary_name": "xul-ext-lightning"
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}