Red Hat Security Advisory: glib2 security update

Fixed packages 7

Vulnerabilities 7

• High 7.3
  CVE-2026-58014

  Glib: off-by-one error in glib/gkeyfile.c via "g_key_file_get_locale_string_list"

  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…

  Red Hat GNOME Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Linux Debian Ubuntu Azure Linux Alpine
  Jun 30, 2026
• Medium 6.5
  CVE-2026-58010

  Glib: buffer over-read in glib/gvariant-serialiser.c via gvs_tuple_is_normal()

  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 byt…

  Red Hat GNOME Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Linux Debian Ubuntu Azure Linux Alpine
  Jun 30, 2026
• Medium 6.5
  CVE-2026-58011

  Glib: out-of-bounds read in glib/gdatetime.c:g_date_time_get_ymd via invalid gdatetime

  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 d…

  Red Hat GNOME Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Linux Debian Ubuntu Azure Linux Alpine
  Jun 30, 2026
• Medium 6.5
  CVE-2026-58012

  Glib: buffer over-read in g_regex_replace() via glib/gregex.c:string_append() and g_utf8_next_char()

  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…

  Red Hat GNOME Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Linux Debian Ubuntu Azure Linux Alpine
  Jun 30, 2026
• Medium 6.5
  CVE-2026-58013

  Glib: buffer over-read in glib/giochannel.c via "g_io_channel_read_line_backend"

  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 cau…

  Red Hat GNOME Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Linux Debian Ubuntu Azure Linux Alpine
  Jun 30, 2026
• Medium 5.9
  CVE-2026-58015

  Glib: path traversal in glib/gio/gdbusauthmechanismsha1.c via keyring_lookup_entry and mechanism_client_data_receive

  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 …

  Red Hat GNOME Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Linux Debian Ubuntu Azure Linux Alpine
  Jun 30, 2026
• Medium 5.3
  CVE-2026-15588

  Gdbusserver: glib2: gdbusserver pre-authentication dos via unbounded sasl line buffering

  A denial-of-service and resource exhaustion vulnerability exists within the `GDBus` component of GLib. The `gdbusauth` authentication mechanism fails to enforce proper length limitations on data lines read from a client. An unauthenticated local or remote att…

  Red Hat Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 6 Linux Debian Ubuntu Azure Linux
  Jul 20, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#moderate
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2492243
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2492245
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2492247
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2492248
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2492255
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2492256
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2499675
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_65773.json
• report
  https://access.redhat.com/security/cve/CVE-2026-15588
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-15588
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-15588
• article
  https://gitlab.gnome.org/GNOME/glib/-/issues/3985
• report
  https://access.redhat.com/security/cve/CVE-2026-58010
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-58010
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-58010
• article
  https://gitlab.gnome.org/GNOME/glib/-/issues/3915
• report
  https://access.redhat.com/security/cve/CVE-2026-58011
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-58011
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-58011
• article
  https://gitlab.gnome.org/GNOME/glib/-/issues/3917
• report
  https://access.redhat.com/security/cve/CVE-2026-58012
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-58012
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-58012
• article
  https://gitlab.gnome.org/GNOME/glib/-/issues/3918
• report
  https://access.redhat.com/security/cve/CVE-2026-58013
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-58013
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-58013
• article
  https://gitlab.gnome.org/GNOME/glib/-/issues/3925
• report
  https://access.redhat.com/security/cve/CVE-2026-58014
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-58014
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-58014
• article
  https://gitlab.gnome.org/GNOME/glib/-/issues/3930
• report
  https://access.redhat.com/security/cve/CVE-2026-58015
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-58015
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-58015
• article
  https://gitlab.gnome.org/GNOME/glib/-/issues/3931