CVE-2019-9791

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    CVE-2019-9791

    Published: 26 Apr 2019Last Modified: 16 Apr 2026

    Summary:

    Details: The type inference system allows the compilation of functions that can cause type confusions between arbitrary objects when compiled through the IonMonkey just-in-time (JIT) compiler and when the constructor function is entered through on-stack replacement (OSR). This allows for possible arbitrary reading and writing of objects during an exploitable crash. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.

    References: 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://www.mozilla.org/security/advisories/mfsa2019-07/, https://www.mozilla.org/security/advisories/mfsa2019-08/, https://bugzilla.mozilla.org/show_bug.cgi?id=1530958

    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