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    CVE-2016-5300

    The XML parser in Expat does not use sufficient entropy for hash initialization, which allows context-dependent attackers to cause a denial of service (CPU consumption) via crafted identifiers in an XML document. NOTE: this vulnerability exists because of an incomplete fix for CVE-2012-0876.

    Published:Jun 4, 2016
    Last Modified:Apr 12, 2025
    EPS:Jun 16, 2016
    EPSS Score:0.02514
    CVSS Score:7.5

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Google
    Product
    Android
    Vendor
    Libexpat Project
    Product
    Libexpat

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-331 Insufficient Entropy

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-59 Session Credential Falsification through Prediction

    Related CVEs

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    CVE-2026-47337 (CVSS 3.3) — Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches with a possible NULL pointer dereference in the handling …
    CVE-2026-47336 (CVSS 3.3) — Ubuntu Linux 6.8 contains SAUCE patches with a possible use of an uninitialized variable in AppArmor AF_INET/A…
    CVE-2026-47335 (CVSS 5.5) — Ubuntu Linux 6.8 contains SAUCE patches with a possible NULL pointer dereference in the handling of AppArmor n…
    CVE-2026-47334 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly sleep while holding a spinlock…
    CVE-2026-47333 (CVSS 7.8) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which can potentially incorrectly compute the si…
    CVE-2026-47332 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly validate the size of an intern…
    CVE-2026-47331 (CVSS 7.8) — Ubuntu Linux 6.8 contains AppArmor SAUCE patches which fail to acquire a lock when modifying a linked list. An…
    CVE-2026-47330 (CVSS 3.3) — Ubuntu Linux 6.8, 7.17 and 7.0 contain AppArmor SAUCE patches which can, under certain circumstances, use an u…

    References

    http://www.debian.org/security/2016/dsa-3597
    http://www.openwall.com/lists/oss-security/2016/06/04/4
    http://www.openwall.com/lists/oss-security/2016/06/04/5
    http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
    http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
    http://www.securityfocus.com/bid/91159
    http://www.ubuntu.com/usn/USN-3010-1
    https://kc.mcafee.com/corporate/index?page=content&id=SB10365
    https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
    https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
    https://security.gentoo.org/glsa/201701-21
    https://source.android.com/security/bulletin/2016-11-01.html
    https://www.tenable.com/security/tns-2016-20
    http://www.debian.org/security/2016/dsa-3597
    http://www.openwall.com/lists/oss-security/2016/06/04/4
    http://www.openwall.com/lists/oss-security/2016/06/04/5
    http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
    http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
    http://www.securityfocus.com/bid/91159
    http://www.ubuntu.com/usn/USN-3010-1
    https://kc.mcafee.com/corporate/index?page=content&id=SB10365
    https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
    https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
    https://security.gentoo.org/glsa/201701-21
    https://source.android.com/security/bulletin/2016-11-01.html
    https://www.tenable.com/security/tns-2016-20

    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