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    CVE-2009-0775

    Double free vulnerability in Mozilla Firefox before 3.0.7, Thunderbird before 2.0.0.21, and SeaMonkey before 1.1.15 allows remote attackers to execute arbitrary code via "cloned XUL DOM elements which were linked as a parent and child," which are not properly handled during garbage collection.

    Published:Mar 4, 2009
    Last Modified:Apr 23, 2026
    EPS:Mar 5, 2009
    EPSS Score:0.06585
    CVSS Score:10

    Affected Products

    Vendor
    Mozilla
    Product
    Firefox
    Vendor
    Mozilla
    Product
    Seamonkey
    Vendor
    Mozilla
    Product
    Thunderbird
    Vendor
    Redhat
    Product
    Enterprise Linux

    Exploits

    No exploit reference

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-84144 (CVSS 7.5) — Internally found bugs present in Thunderbird 154 and Thunderbird ESR 153.1. Some of these bugs showed evidence…
    CVE-2026-84143 (CVSS 9.8) — Internally found bugs present in Thunderbird 154, Thunderbird ESR 153.1 and Thunderbird ESR 140.14. Some of th…
    CVE-2026-84142 (CVSS 9.8) — Internally found bugs present in Thunderbird 154. Some of these bugs showed evidence of memory corruption or a…
    CVE-2026-84141 (CVSS 9.8) — Integer overflow in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 155, Firefox ESR…
    CVE-2026-84140 (CVSS 9.8) — Site isolation issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ES…
    CVE-2026-84139 (CVSS 6.1) — Clickjacking issue in the DOM: Events component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.…
    CVE-2026-84138 (CVSS 6.5) — Denial-of-service in the PDF Viewer component. This vulnerability was fixed in Firefox 155 and Thunderbird 155…
    CVE-2026-84137 (CVSS 4.3) — Spoofing issue in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 155, Firefox ESR 153…
    CVE-2026-84136 (CVSS 6.1) — Other issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, …
    CVE-2026-84135 (CVSS 9.8) — Other issue in Firefox Focus for Android. This vulnerability was fixed in Firefox 155.…

    References

    http://lists.opensuse.org/opensuse-security-announce/2009-03/msg00002.html
    http://secunia.com/advisories/34137
    http://secunia.com/advisories/34140
    http://secunia.com/advisories/34145
    http://secunia.com/advisories/34272
    http://secunia.com/advisories/34324
    http://secunia.com/advisories/34383
    http://secunia.com/advisories/34417
    http://support.avaya.com/elmodocs2/security/ASA-2009-069.htm
    http://support.avaya.com/japple/css/japple?temp.documentID=366362&temp.productID=154235&temp.releaseID=361845&temp.bucketID=126655&PAGE=Document
    http://www.debian.org/security/2009/dsa-1751
    http://www.mandriva.com/security/advisories?name=MDVSA-2009:075
    http://www.mozilla.org/security/announce/2009/mfsa2009-08.html
    http://www.redhat.com/support/errata/RHSA-2009-0258.html
    http://www.redhat.com/support/errata/RHSA-2009-0315.html
    http://www.redhat.com/support/errata/RHSA-2009-0325.html
    http://www.securityfocus.com/bid/33990
    http://www.securitytracker.com/id?1021796
    http://www.vupen.com/english/advisories/2009/0632
    https://bugzilla.mozilla.org/show_bug.cgi?id=474456
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5806
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5816
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6207
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7584
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9681
    https://www.redhat.com/archives/fedora-package-announce/2009-March/msg00769.html
    https://www.redhat.com/archives/fedora-package-announce/2009-March/msg00771.html
    http://lists.opensuse.org/opensuse-security-announce/2009-03/msg00002.html
    http://secunia.com/advisories/34137
    http://secunia.com/advisories/34140
    http://secunia.com/advisories/34145
    http://secunia.com/advisories/34272
    http://secunia.com/advisories/34324
    http://secunia.com/advisories/34383
    http://secunia.com/advisories/34417
    http://support.avaya.com/elmodocs2/security/ASA-2009-069.htm
    http://support.avaya.com/japple/css/japple?temp.documentID=366362&temp.productID=154235&temp.releaseID=361845&temp.bucketID=126655&PAGE=Document
    http://www.debian.org/security/2009/dsa-1751
    http://www.mandriva.com/security/advisories?name=MDVSA-2009:075
    http://www.mozilla.org/security/announce/2009/mfsa2009-08.html
    http://www.redhat.com/support/errata/RHSA-2009-0258.html
    http://www.redhat.com/support/errata/RHSA-2009-0315.html
    http://www.redhat.com/support/errata/RHSA-2009-0325.html
    http://www.securityfocus.com/bid/33990
    http://www.securitytracker.com/id?1021796
    http://www.vupen.com/english/advisories/2009/0632
    https://bugzilla.mozilla.org/show_bug.cgi?id=474456
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5806
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5816
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6207
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7584
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9681
    https://www.redhat.com/archives/fedora-package-announce/2009-March/msg00769.html
    https://www.redhat.com/archives/fedora-package-announce/2009-March/msg00771.html

    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