A flaw was found in GLib. A state confusion issue exists in g_dbus_node_info_new_for_xml() in the gio/gdbusintrospection.c file when processing malformed D-Bus introspection XML, specifically with a <node> element nested within other elements like <method>, <signal>, <property> or <arg>. This issue can cause an unsigned integer overflow and lead to an out-of-bounds read, resulting in a denial of service.

Multiple Vulnerabilities in GNOME GLib

The remote RockyLinux 10 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2026:42063 advisory.

    * glib: integer underflow in gio/gdbusintrospection.c via g_dbus_node_info_new_for_xml (CVE-2026-58016)

Tenable has extracted the preceding description block directly from the RockyLinux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote RockyLinux 9 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2026:42089 advisory.

    * glib: integer underflow in gio/gdbusintrospection.c via g_dbus_node_info_new_for_xml (CVE-2026-58016)

Tenable has extracted the preceding description block directly from the RockyLinux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote MiracleLinux 8 host has packages installed that are affected by a vulnerability as referenced in the AXSA:2026-1327:11 advisory.

    * glib: integer underflow in gio/gdbusintrospection.c via g_dbus_node_info_new_for_xml (CVE-2026-58016)

Tenable has extracted the preceding description block directly from the MiracleLinux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote AlmaLinux 10 host has packages installed that are affected by a vulnerability as referenced in the ALSA-2026:42063 advisory.

    * glib: integer underflow in gio/gdbusintrospection.c via g_dbus_node_info_new_for_xml (CVE-2026-58016)

Tenable has extracted the preceding description block directly from the AlmaLinux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The version of glib2 installed on the remote host is prior to 2.56.1-9. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2026-3803 advisory.

    A flaw was found in GLib. A state confusion issue exists in g_dbus_node_info_new_for_xml() in the     gio/gdbusintrospection.c file when processing malformed D-Bus introspection XML, specifically with a     <node> element nested within other elements like <method>, <signal>, <property> or <arg>. This issue can     cause an unsigned integer overflow and lead to an out-of-bounds read, resulting in a denial of service.
    (CVE-2026-58016)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 10 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2026-42063 advisory.

    - Fix CVE-2026-58016: D-Bus introspection XML node nesting validation

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 8 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2026-42090 advisory.

    - Add patch for CVE-2026-58016
    - Add patch for CVE-2025-14087 and CVE-2025-14512
    - Add patch for CVE-2025-13601

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 9 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2026-42089 advisory.

    - Fix CVE-2026-58016: broken node element nesting validation in       D-Bus introspection XML parsing

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote AlmaLinux 9 host has packages installed that are affected by a vulnerability as referenced in the ALSA-2026:42089 advisory.

    * glib: integer underflow in gio/gdbusintrospection.c via g_dbus_node_info_new_for_xml (CVE-2026-58016)

Tenable has extracted the preceding description block directly from the AlmaLinux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote AlmaLinux 8 host has packages installed that are affected by a vulnerability as referenced in the ALSA-2026:42090 advisory.

    * glib: integer underflow in gio/gdbusintrospection.c via g_dbus_node_info_new_for_xml (CVE-2026-58016)

Tenable has extracted the preceding description block directly from the AlmaLinux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:42089 advisory.

    GLib provides the core application building blocks for libraries and applications written in C. It     provides the core object system used in GNOME, the main loop implementation, and a large set of utility     functions for strings and common data structures.

    Security Fix(es):

    * glib: integer underflow in gio/gdbusintrospection.c via g_dbus_node_info_new_for_xml (CVE-2026-58016)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote RockyLinux 8 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2026:42090 advisory.

    * glib: integer underflow in gio/gdbusintrospection.c via g_dbus_node_info_new_for_xml (CVE-2026-58016)

Tenable has extracted the preceding description block directly from the RockyLinux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1942 advisory.

    A flaw was found in GLib. An off-by-one error can occur in the gvs_tuple_is_normal function in the     glib/gvariant-serialiser.c file when doing an alignment padding check because the bounds check uses >     instead of >=, causing an out-of-bounds read of only 1 byte. This issue can cause a minor information     disclosure of 1 byte and a denial of service when the out-of-bounds read crosses a page boundary.
    (CVE-2026-58010)

    A flaw was found in GLib. An out-of-bounds read of only 2 bytes can occur in the g_date_time_get_ymd     function in the glib/gdatetime.c file when an invalid GDateTime object produced by the     g_date_time_add_full function is processed. This flaw can corrupt the date output and potentially cause     logic errors that may lead to a denial of service. (CVE-2026-58011)

    A flaw was found in GLib. A buffer over-read can occur in the g_regex_replace function when used with the     `G_REGEX_RAW` compile flag and case-change replacement escapes because the string_append function     processes matched substrings using UTF-8 functions that assume valid UTF-8 input, even when the string is     treated as raw bytes. This vulnerability can cause a minor information disclosure of 1-5 bytes and a     denial of service when the buffer over-read crosses a page boundary. (CVE-2026-58012)

    A flaw was found in GLib. A buffer over-read can occur in g_io_channel_read_line_backend() in the     giochannel.c file when a custom line terminator with a length greater than one is set, causing memcmp to     read past the GString buffer. This vulnerability can cause a minor information disclosure of 7 bytes or a     denial of service when the buffer over-read crosses a page boundary. (CVE-2026-58013)

    A flaw was found in GLib. An off-by-one error can occur in the g_key_file_get_locale_string_list function     in the gkeyfile.c file when loading a key file with an empty value. This flaw can cause an out-of-bounds     access of 1 byte or a denial of service when the out-of-bounds access crosses a page boundary.
    (CVE-2026-58014)

    A flaw was found in GLib. The D-Bus client-side implementation of the DBUS_COOKIE_SHA1 SASL authentication     mechanism does not validate the cookie_context parameter received from the server. A malicious D-Bus     server can supply a cookie_context containing path traversal sequences, causing the client to read an     arbitrary file and exfiltrate sensitive data by verifying guessed file contents against a generated hash.
    (CVE-2026-58015)

    A flaw was found in GLib. A state confusion issue exists in g_dbus_node_info_new_for_xml() in the     gio/gdbusintrospection.c file when processing malformed D-Bus introspection XML, specifically with a     <node> element nested within other elements like <method>, <signal>, <property> or <arg>. This issue can     cause an unsigned integer overflow and lead to an out-of-bounds read, resulting in a denial of service.
    (CVE-2026-58016)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:42090 advisory.

    GLib provides the core application building blocks for libraries and applications written in C. It     provides the core object system used in GNOME, the main loop implementation, and a large set of utility     functions for strings and common data structures.

    Security Fix(es):

    * glib: integer underflow in gio/gdbusintrospection.c via g_dbus_node_info_new_for_xml (CVE-2026-58016)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 10 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:42063 advisory.

    GLib provides the core application building blocks for libraries and applications written in C. It     provides the core object system used in GNOME, the main loop implementation, and a large set of utility     functions for strings and common data structures.

    Security Fix(es):

    * glib: integer underflow in gio/gdbusintrospection.c via g_dbus_node_info_new_for_xml (CVE-2026-58016)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-8e39f35701 advisory.

    Backport fix for CVE-2026-58016.

    ----

    Update to glib-2.86.5.

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-7bf2937528 advisory.

    Backport fix for CVE-2026-58016.

    ----

    Update to glib-2.88.2.

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - A flaw was found in GLib. A state confusion issue exists in g_dbus_node_info_new_for_xml() in the     gio/gdbusintrospection.c file when processing malformed D-Bus introspection XML, specifically with a     <node> element nested within other elements like <method>, <signal>, <property> or <arg>. This issue can     cause an unsigned integer overflow and lead to an out-of-bounds read, resulting in a denial of service.
    (CVE-2026-58016)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
329055	RockyLinux 10 : glib2 (RLSA-2026:42063)	Nessus	Rocky Linux Local Security Checks	critical
329054	RockyLinux 9 : glib2 (RLSA-2026:42089)	Nessus	Rocky Linux Local Security Checks	critical
328943	MiracleLinux 8 : glib2-2.56.4-170.el8_10 (AXSA:2026-1327:11)	Nessus	Miracle Linux Local Security Checks	critical
328852	AlmaLinux 10 : glib2 (ALSA-2026:42063)	Nessus	Alma Linux Local Security Checks	critical
328840	Amazon Linux 2 : glib2, --advisory ALAS2-2026-3803 (ALAS-2026-3803)	Nessus	Amazon Linux Local Security Checks	critical
328820	Oracle Linux 10 : glib2 (ELSA-2026-42063)	Nessus	Oracle Linux Local Security Checks	critical
328812	Oracle Linux 8 : glib2 (ELSA-2026-42090)	Nessus	Oracle Linux Local Security Checks	critical
328811	Oracle Linux 9 : glib2 (ELSA-2026-42089)	Nessus	Oracle Linux Local Security Checks	critical
328787	AlmaLinux 9 : glib2 (ALSA-2026:42089)	Nessus	Alma Linux Local Security Checks	critical
328785	AlmaLinux 8 : glib2 (ALSA-2026:42090)	Nessus	Alma Linux Local Security Checks	critical
328670	RHEL 9 : glib2 (RHSA-2026:42089)	Nessus	Red Hat Local Security Checks	critical
328669	RockyLinux 8 : glib2 (RLSA-2026:42090)	Nessus	Rocky Linux Local Security Checks	critical
328478	Amazon Linux 2023 : glib2, glib2-devel, glib2-static (ALAS2023-2026-1942)	Nessus	Amazon Linux Local Security Checks	critical
328360	RHEL 8 : glib2 (RHSA-2026:42090)	Nessus	Red Hat Local Security Checks	critical
328356	RHEL 10 : glib2 (RHSA-2026:42063)	Nessus	Red Hat Local Security Checks	critical
327554	Fedora 43 : mingw-glib2 (2026-8e39f35701)	Nessus	Fedora Local Security Checks	critical
327486	Fedora 44 : mingw-glib2 (2026-7bf2937528)	Nessus	Fedora Local Security Checks	critical
324013	Linux Distros Unpatched Vulnerability : CVE-2026-58016	Nessus	Misc.	critical

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