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    CVE-2010-0220

    The nsObserverList::FillObserverArray function in xpcom/ds/nsObserverList.cpp in Mozilla Firefox before 3.5.7 allows remote attackers to cause a denial of service (application crash) via a crafted web site that triggers memory consumption and an accompanying Low Memory alert dialog, and also triggers attempted removal of an observer from an empty observers array.

    Published:Jul 29, 2009
    Last Modified:Apr 23, 2026
    EPS:Jan 7, 2010
    EPSS Score:0.00947
    CVSS Score:5

    Affected Products

    Vendor
    Mozilla
    Product
    Firefox

    Exploits

    http://hg.mozilla.org/mozilla-central/rev/51396f6c9f20https://bugzilla.mozilla.org/show_bug.cgi?id=507114http://hg.mozilla.org/mozilla-central/rev/51396f6c9f20https://bugzilla.mozilla.org/show_bug.cgi?id=507114

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    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://hg.mozilla.org/mozilla-central/rev/51396f6c9f20
    http://isc.sans.org/diary.html?storyid=7897
    http://www.mandriva.com/security/advisories?name=MDVSA-2010:000
    http://www.mozilla.com/en-US/firefox/3.5.7/releasenotes/
    https://bugzilla.mozilla.org/show_bug.cgi?id=507114
    https://exchange.xforce.ibmcloud.com/vulnerabilities/55550
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8292
    http://hg.mozilla.org/mozilla-central/rev/51396f6c9f20
    http://isc.sans.org/diary.html?storyid=7897
    http://www.mandriva.com/security/advisories?name=MDVSA-2010:000
    http://www.mozilla.com/en-US/firefox/3.5.7/releasenotes/
    https://bugzilla.mozilla.org/show_bug.cgi?id=507114
    https://exchange.xforce.ibmcloud.com/vulnerabilities/55550
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8292

    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