CVE-2023-29499

Application denial of service via malformed GVariant offsets

Published Sep 14, 2023 · Updated Dec 18, 2025

Uncontrolled resource consumption in GLib before 2.74.4 allows local users to interrupt applications with malformed GVariant data. The is_normal() path fails to validate an offset-table entry size against the serialized GVariant layout before processing it, enabling excessive CPU or memory consumption. Remote reachability requires a consuming application configured to accept GVariant data over a network, which is not the default.

CVSS severity7.5
High
EPSS probability0.77%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in GLib before 2.74.4 allows local users to interrupt applications with malformed GVariant data. The is_normal() path fails to validate an offset-table entry size against the serialized GVariant layout before processing it, enabling excessive CPU or memory consumption. Remote reachability requires a consuming application configured to accept GVariant data over a network, which is not the default.

The record

CVE
CVE-2023-29499
Published
Sep 14, 2023
Updated
Dec 18, 2025
Vendor
Red Hat
Product
Red Hat Enterprise Linux 8
Classifications
CWE-400, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Dec 18, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Red Hat · Red Hat Enterprise Linux 8Affected versions are unavailable in this record.
Fedora Project · Fedora LinuxAffected versions are unavailable in this record.
XMLSoft · GLibAffected versions are unavailable in this record.
Red Hat · Red Hat Enterprise Linux 9Affected versions are unavailable in this record.
Fedora Project · Extra Packages for Enterprise LinuxAffected versions are unavailable in this record.

Published CVSS scores

7.5GitLab Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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