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Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS : GLib vulnerabilities (USN-8794-1)

critical Nessus Plugin ID 350297

Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

The remote Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8794-1 advisory.

 It was discovered that GLib's GDBus authentication mechanism failed to enforce length limitations on data lines read from a client. An unauthenticated attacker could exploit this to cause a denial of service via resource exhaustion. (CVE-2026-15588)

 It was discovered that the xdgmime library in GLib had a heap-based buffer overflow. An attacker- controlled MIME magic file could cause an out-of-bounds write on little-endian systems. (CVE-2026-16118)

 It was discovered that GLib had an off-by-one error in the GVariant serialiser. An attacker could use this to cause an out-of-bounds read, leading to information disclosure or a denial of service. (CVE-2026-58010)

 It was discovered that GLib had an out-of-bounds read in GDateTime. An attacker could use this to corrupt date output and cause a denial of service. (CVE-2026-58011)

 It was discovered that GLib's g_regex_replace() function had a buffer over-read when used with the G_REGEX_RAW flag. An attacker could use this to cause information disclosure or a denial of service.
 (CVE-2026-58012)

 It was discovered that GLib's GIOChannel had a buffer over-read when using a custom line terminator. An attacker could use this to cause information disclosure or a denial of service. (CVE-2026-58013)

 It was discovered that GLib's GKeyFile had an off-by-one error when loading a key file with an empty value. An attacker could use this to cause an out-of-bounds access or a denial of service.
 (CVE-2026-58014)

 It was discovered that GLib's DBUS_COOKIE_SHA1 authentication mechanism failed to validate the cookie_context parameter. A malicious D-Bus server could use this to read arbitrary files from the client.
 (CVE-2026-58015)

 It was discovered that GLib's D-Bus introspection XML parser had a state confusion issue. An attacker could use this to cause an out-of-bounds read and denial of service. (CVE-2026-58016)

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

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

Solution

Update the affected packages.

See Also

https://ubuntu.com/security/notices/USN-8794-1

Plugin Details

Severity: Critical

ID: 350297

File Name: ubuntu_USN-8794-1.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 9/25/2026

Updated: 9/25/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.5

Percentile: 96.18

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:C

CVSS Score Source: CVE-2026-58016

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 8.2

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:14.04:-:lts, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, cpe:/o:canonical:ubuntu_linux:26.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:gir1.2-girepository-3.0, p-cpe:/a:canonical:ubuntu_linux:gir1.2-glib-2.0, p-cpe:/a:canonical:ubuntu_linux:girepository-tools, p-cpe:/a:canonical:ubuntu_linux:libgio-2.0-dev-bin, p-cpe:/a:canonical:ubuntu_linux:libgirepository-2.0-0, p-cpe:/a:canonical:ubuntu_linux:libglib2.0-0-refdbg, p-cpe:/a:canonical:ubuntu_linux:libglib2.0-0, p-cpe:/a:canonical:ubuntu_linux:libglib2.0-0t64, p-cpe:/a:canonical:ubuntu_linux:libglib2.0-bin, p-cpe:/a:canonical:ubuntu_linux:libglib2.0-data, p-cpe:/a:canonical:ubuntu_linux:libglib2.0-dev-bin, p-cpe:/a:canonical:ubuntu_linux:libglib2.0-tests

Required KB Items: Host/cpu, Host/Debian/dpkg-l, Host/Ubuntu, Host/Ubuntu/release

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 9/21/2026

Vulnerability Publication Date: 6/30/2026

Reference Information

CVE: CVE-2026-15588, CVE-2026-16118, CVE-2026-58010, CVE-2026-58011, CVE-2026-58012, CVE-2026-58013, CVE-2026-58014, CVE-2026-58015, CVE-2026-58016

USN: 8794-1