CVE-2023-32636

Application hang via slow offset-table validation

Published Sep 14, 2023 · Updated Feb 13, 2025

Uncontrolled resource consumption in GLib 2.75.1 allows local users to hang applications that deserialize crafted GVariants. The GVariant deserializer performs pathologically slow offset-table validation on crafted input after an earlier validation change. Exposure requires an application built with the affected change to process attacker-controlled GVariant data; D-Bus traffic is not affected.

CVSS severity4.7
Medium
EPSS probability0.78%
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 2.75.1 allows local users to hang applications that deserialize crafted GVariants. The GVariant deserializer performs pathologically slow offset-table validation on crafted input after an earlier validation change. Exposure requires an application built with the affected change to process attacker-controlled GVariant data; D-Bus traffic is not affected.

The record

CVE
CVE-2023-32636
Published
Sep 14, 2023
Updated
Feb 13, 2025
Vendor
XMLSoft
Product
GLib
Classifications
CWE-502, CWE-400, T1499.004
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.75.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

XMLSoft · GLibversion=2.75.1

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
4.7Red Hat, Inc.CVSS:3.1/AV:L/AC:H/PR:L/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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
CWE-400Uncontrolled Resource Consumption
T1499.004Application or System Exploitation

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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