Amazon Linux 2023 Security Advisory: ALAS2023-2026-1942
Advisory Released Date: 2026-07-20
Advisory Updated Date: 2026-07-20
FAQs regarding Amazon Linux ALAS/CVE Severity
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)
Affected Packages:
glib2
Issue Correction:
Run dnf update glib2 --releasever 2023.12.20260720 or dnf update --advisory ALAS2023-2026-1942 --releasever 2023.12.20260720 to update your system.
More information on how to update your system can be found on this page: Amazon Linux 2023 documentation
aarch64:
glib2-static-2.82.2-770.amzn2023.aarch64
glib2-devel-debuginfo-2.82.2-770.amzn2023.aarch64
glib2-devel-2.82.2-770.amzn2023.aarch64
glib2-debuginfo-2.82.2-770.amzn2023.aarch64
glib2-2.82.2-770.amzn2023.aarch64
glib2-debugsource-2.82.2-770.amzn2023.aarch64
glib2-tests-2.82.2-770.amzn2023.aarch64
glib2-tests-debuginfo-2.82.2-770.amzn2023.aarch64
glib2-doc-2.82.2-770.amzn2023.aarch64
src:
glib2-2.82.2-770.amzn2023.src
x86_64:
glib2-devel-debuginfo-2.82.2-770.amzn2023.x86_64
glib2-debuginfo-2.82.2-770.amzn2023.x86_64
glib2-static-2.82.2-770.amzn2023.x86_64
glib2-devel-2.82.2-770.amzn2023.x86_64
glib2-2.82.2-770.amzn2023.x86_64
glib2-debugsource-2.82.2-770.amzn2023.x86_64
glib2-tests-2.82.2-770.amzn2023.x86_64
glib2-tests-debuginfo-2.82.2-770.amzn2023.x86_64
glib2-doc-2.82.2-770.amzn2023.x86_64