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    CVE-2018-18493

    A buffer overflow can occur in the Skia library during buffer offset calculations with hardware accelerated canvas 2D actions due to the use of 32-bit calculations instead of 64-bit. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.4, Firefox ESR < 60.4, and Firefox < 64.

    Published:Dec 11, 2018
    Last Modified:Nov 25, 2025
    EPS:Feb 28, 2019
    EPSS Score:0.26466
    CVSS Score:9.8

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Mozilla
    Product
    Firefox
    Vendor
    Mozilla
    Product
    Thunderbird
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Enterprise Linux Desktop
    Vendor
    Redhat
    Product
    Enterprise Linux Server
    Vendor
    Redhat
    Product
    Enterprise Linux Server Aus
    Vendor
    Redhat
    Product
    Enterprise Linux Server Eus
    Vendor
    Redhat
    Product
    Enterprise Linux Server Tus
    Vendor
    Redhat
    Product
    Enterprise Linux Workstation

    Exploits

    No exploit reference

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    References

    http://www.securityfocus.com/bid/106168
    https://access.redhat.com/errata/RHSA-2018:3831
    https://access.redhat.com/errata/RHSA-2018:3833
    https://access.redhat.com/errata/RHSA-2019:0159
    https://access.redhat.com/errata/RHSA-2019:0160
    https://bugzilla.mozilla.org/show_bug.cgi?id=1504452
    https://lists.debian.org/debian-lts-announce/2018/12/msg00002.html
    https://security.gentoo.org/glsa/201903-04
    https://usn.ubuntu.com/3844-1/
    https://usn.ubuntu.com/3868-1/
    https://www.debian.org/security/2018/dsa-4354
    https://www.debian.org/security/2019/dsa-4362
    https://www.mozilla.org/security/advisories/mfsa2018-29/
    https://www.mozilla.org/security/advisories/mfsa2018-30/
    https://www.mozilla.org/security/advisories/mfsa2018-31/
    http://www.securityfocus.com/bid/106168
    https://access.redhat.com/errata/RHSA-2018:3831
    https://access.redhat.com/errata/RHSA-2018:3833
    https://access.redhat.com/errata/RHSA-2019:0159
    https://access.redhat.com/errata/RHSA-2019:0160
    https://bugzilla.mozilla.org/show_bug.cgi?id=1504452
    https://lists.debian.org/debian-lts-announce/2018/12/msg00002.html
    https://security.gentoo.org/glsa/201903-04
    https://usn.ubuntu.com/3844-1/
    https://usn.ubuntu.com/3868-1/
    https://www.debian.org/security/2018/dsa-4354
    https://www.debian.org/security/2019/dsa-4362
    https://www.mozilla.org/security/advisories/mfsa2018-29/
    https://www.mozilla.org/security/advisories/mfsa2018-30/
    https://www.mozilla.org/security/advisories/mfsa2018-31/

    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