Glib

Denial of service in GNOME GLib (versions before 2.88.1) arises when g_dbus_node_info_new_for_xml() parses malformed D-Bus introspection XML that nests a <node> element inside <method>, <signal>, <property>, or <arg>. This state-confusion bug triggers an unsigned integer underflow/overflow (CWE-191) and a subsequent out-of-bounds read, crashing any application or service that parses attacker-influenced introspection data. No public exploit identified at time of analysis, EPSS is low (0.34%), and CISA SSVC rates exploitation as none with only partial technical impact.

Arbitrary file disclosure in GLib's GDBus client affects the DBUS_COOKIE_SHA1 SASL authentication mechanism, where the client fails to validate the server-supplied cookie_context parameter. A malicious or compromised D-Bus server can send a cookie_context containing path traversal sequences, forcing the client to read attacker-chosen files and leak their contents by confirming guessed values against the returned authentication hash. No public exploit has been identified and it is not in CISA KEV; EPSS is low at 0.30% (22th percentile), consistent with the SSVC assessment of no known exploitation.

Denial of service (and a 1-byte out-of-bounds read) in GNOME GLib before 2.88.1 arises from an off-by-one error in g_key_file_get_locale_string_list() in gkeyfile.c when a parsed key file contains an empty value. Any application built on GLib that loads attacker-influenced .desktop/.ini-style key files can be crashed if the over-read crosses a page boundary, with a minor information-disclosure component from the single out-of-bounds byte. Publicly available exploit code exists (SSVC 'poc'), but it is not on CISA KEV and EPSS is low (0.24%, 15th percentile), indicating no evidence of widespread active exploitation.

Buffer over-read in GLib's giochannel line-reading code (g_io_channel_read_line_backend) affects the GNOME GLib library prior to version 2.88.1, where an application that configures a multi-byte custom line terminator triggers memcmp to read past the end of the internal GString buffer. Depending on memory layout, this leaks up to 7 bytes of adjacent heap memory (minor information disclosure) or crashes the process when the over-read crosses an unmapped page boundary (denial of service). There is no public exploit identified at time of analysis, EPSS is low (0.27%), and CISA SSVC rates exploitation as none.

Buffer over-read in GNOME GLib's g_regex_replace() lets remote attackers leak 1-5 adjacent bytes of process memory and crash applications when regex replacement is performed with the G_REGEX_RAW compile flag combined with case-change replacement escapes. The internal string_append helper applies UTF-8 aware routines to matched substrings even though G_REGEX_RAW treats the buffer as raw bytes, reading past the intended boundary. There is no public exploit identified at time of analysis and EPSS is low (0.26%, 18th percentile), but the flaw is broadly reachable because GLib underpins the GNOME stack and ships across Red Hat Enterprise Linux 6-10.

Out-of-bounds read of two bytes in GLib's g_date_time_get_ymd() (glib/gdatetime.c) lets attackers corrupt date output and trigger logic errors that may cause denial of service when an application processes an invalid GDateTime produced by g_date_time_add_full(). It affects the GNOME GLib core utility library shipped across Red Hat Enterprise Linux 6 through 10, with fixes in GLib 2.88.1 and 2.86.5. There is publicly available exploit code exists per SSVC (proof-of-concept), no confirmed active exploitation, and EPSS is low at 0.27% (19th percentile).

Out-of-bounds read in GNOME GLib's GVariant serialiser allows remote attackers to leak a single byte of adjacent memory and to crash applications that deserialise untrusted GVariant data. The flaw sits in gvs_tuple_is_normal() in glib/gvariant-serialiser.c, where an alignment-padding bounds check uses '>' instead of '>=', reading one byte past the buffer; when that byte falls across a page boundary the process faults, producing a denial of service. No public exploit identified at time of analysis, and EPSS is low (0.26%), but GLib's near-universal presence on Linux systems makes the exposure broad.

Integer overflow in GLib's GIO escape_byte_string() function enables heap buffer overflow and denial-of-service when processing malicious filesystem attribute values over the network. The vulnerability affects GLib across GNOME, Red Hat Enterprise Linux 7-10, and OpenShift 4.0+, requiring only unauthenticated network access and user interaction. EPSS score of 0.07% (percentile 22) indicates low exploitation probability despite CVSS 6.5, suggesting the attack requires specific file/attribute handling conditions; no public exploit or active exploitation (CISA KEV) confirmed at analysis time.

Heap corruption in GLib (GNOME's core C utility library) lets remote attackers trigger a buffer-underflow in the GVariant parser by supplying maliciously crafted serialized/text input, resulting in denial of service and potentially arbitrary code execution. Any application linking GLib that deserializes untrusted GVariant data is exposed, which spans broad swaths of the Linux desktop and system stack across Red Hat Enterprise Linux 7-10 and SUSE. There is no public exploit identified at time of analysis, and EPSS exploitation probability is low (0.26%, 49th percentile) despite the 9.8 CVSS, indicating the headline severity is not yet matched by observed exploitation interest.

Heap-based buffer overflow in GLib's g_escape_uri_string() function allows local attackers to achieve high-integrity and high-availability impacts through integer overflow in escaped string length calculation. The vulnerability affects Red Hat Enterprise Linux 9.0 and 10.0 across multiple architectures (x86_64, ARM64, IBM Z, PowerPC). Vendor patches are available via multiple RHSA advisories. Publicly available exploit code exists, but EPSS score remains extremely low (0.01%, 1st percentile), suggesting minimal real-world exploitation activity despite the availability of technical details.

Denial of service in GNOME GLib on Windows platforms occurs when an application uses GLib's process-spawning functions with excessively long command lines, causing the spawn operation to fail or crash the host process and disrupt availability. The flaw affects the GLib library's Windows command-line handling and impacts any Windows application that links GLib and passes attacker-influenced long argument strings to a child process. No public exploit identified at time of analysis, and the issue is not listed in CISA KEV; despite Red Hat tags mentioning RCE/Code Injection, the CVSS impact metrics confirm availability-only impact (C:N/I:N/A:H).

gio/gsocks4aproxy.c in GNOME GLib before 2.82.1 has an off-by-one error and resultant buffer overflow because SOCKS4_CONN_MSG_LEN is not sufficient for a trailing '\0' character. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

An issue was discovered in GNOME GLib before 2.78.5, and 2.79.x and 2.80.x before 2.80.1. Rated medium severity (CVSS 5.2), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

A flaw was found in GLib. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. No vendor patch available.

A flaw was found in GLib. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. No vendor patch available.

A flaw was found in glib, where the gvariant deserialization code is vulnerable to a denial of service introduced by additional input validation added to resolve CVE-2023-29499. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

A flaw was found in GLib. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. No vendor patch available.

A flaw was found in GLib. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

An issue was discovered in GNOME GLib before 2.66.8. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

An issue was discovered in GNOME GLib before 2.66.6 and 2.67.x before 2.67.3. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

An issue was discovered in GNOME GLib before 2.66.7 and 2.67.x before 2.67.4. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.

GNOME GLib before 2.65.3 has an integer overflow, that might lead to an out-of-bounds write, in g_option_group_add_entries. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. Public exploit code available.

GSocketClient in GNOME GLib through 2.62.4 may occasionally connect directly to a target address instead of connecting via a proxy server when configured to do so, because the proxy_addr field is. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable, no authentication required. Public exploit code available and no vendor patch available.

The keyfile settings backend in GNOME GLib (aka glib2.0) before 2.60.0 creates directories using g_file_make_directory_with_parents (kfsb->dir, NULL, NULL) and files using g_file_replace_contents. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Incorrect Permission Assignment vulnerability could allow attackers to access resources due to misconfigured permissions.

file_copy_fallback in gio/gfile.c in GNOME GLib 2.15.0 through 2.61.1 does not properly restrict file permissions while a copy operation is in progress. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Incorrect Default Permissions vulnerability could allow attackers to access resources due to overly permissive default settings.

gio/gsocketclient.c in GNOME GLib 2.59.2 does not ensure that a parent GTask remains alive during the execution of a connection-attempting enumeration, which allows remote attackers to cause a denial. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

GNOME GLib 2.56.1 has an out-of-bounds read vulnerability in g_markup_parse_context_parse() in gmarkup.c, related to utf8_str(). Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

In GNOME GLib 2.56.1, g_markup_parse_context_end_parse() in gmarkup.c has a NULL pointer dereference. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

GLib 2.31.8 and earlier, when the g_str_hash function is used, computes hash values without restricting the ability to trigger hash collisions predictably, which allows context-dependent attackers to. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.