CVE-2019-9792

    Dashboard / Vulnerabilities / CVE-2019-9792

    CVE-2019-9792

    Published: 26 Apr 2019Last Modified: 16 Apr 2026

    Summary:

    Details: The IonMonkey just-in-time (JIT) compiler can leak an internal JS_OPTIMIZED_OUT magic value to the running script during a bailout. This magic value can then be used by JavaScript to achieve memory corruption, which results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.

    References: https://www.mozilla.org/security/advisories/mfsa2019-07/, https://www.mozilla.org/security/advisories/mfsa2019-08/, https://www.mozilla.org/security/advisories/mfsa2019-11/, https://access.redhat.com/errata/RHSA-2019:0966, https://access.redhat.com/errata/RHSA-2019:1144, https://bugzilla.mozilla.org/show_bug.cgi?id=1532599, http://packetstormsecurity.com/files/153106/Spidermonkey-IonMonkey-JS_OPTIMIZED_OUT-Value-Leak.html

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High