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    CVE-2018-14404

    A NULL pointer dereference vulnerability exists in the xpath.c:xmlXPathCompOpEval() function of libxml2 through 2.9.8 when parsing an invalid XPath expression in the XPATH_OP_AND or XPATH_OP_OR case. Applications processing untrusted XSL format inputs with the use of the libxml2 library may be vulnerable to a denial of service attack due to a crash of the application.

    Published:Jun 18, 2018
    Last Modified:Dec 3, 2025
    EPS:Jul 19, 2018
    EPSS Score:0.20199
    CVSS Score:6.5

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Redhat
    Product
    Ansible Tower
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Jboss Core Services
    Vendor
    Xmlsoft
    Product
    Libxml2

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-476 NULL Pointer Dereference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2026-13367 (CVSS 7.8) — IBM Informix Dynamic Server 14.10, and 15.0 contain a local privilege escalation vulnerability in the oninit s…
    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

    https://access.redhat.com/errata/RHSA-2019:1543
    https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=901817
    https://bugzilla.redhat.com/show_bug.cgi?id=1595985
    https://gitlab.gnome.org/GNOME/libxml2/issues/10
    https://lists.debian.org/debian-lts-announce/2018/09/msg00035.html
    https://lists.debian.org/debian-lts-announce/2020/09/msg00009.html
    https://security.netapp.com/advisory/ntap-20190719-0002/
    https://usn.ubuntu.com/3739-1/
    https://usn.ubuntu.com/3739-2/
    https://access.redhat.com/errata/RHSA-2019:1543
    https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=901817
    https://bugzilla.redhat.com/show_bug.cgi?id=1595985
    https://gitlab.gnome.org/GNOME/libxml2/issues/10
    https://lists.debian.org/debian-lts-announce/2018/09/msg00035.html
    https://lists.debian.org/debian-lts-announce/2020/09/msg00009.html
    https://security.netapp.com/advisory/ntap-20190719-0002/
    https://usn.ubuntu.com/3739-1/
    https://usn.ubuntu.com/3739-2/

    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