CVE-2023-32643

Memory corruption via malformed GVariant child data

Published Sep 14, 2023 · Updated Feb 13, 2025

Heap buffer overflow in GLib GVariant deserialization allows attackers to corrupt process memory through a crafted non-normal GVariant. The g_variant_serialised_get_child function accesses a heap buffer outside its bounds while processing malformed serialized child data. Exposure requires an application to process attacker-supplied input on a distributor build carrying the earlier CVE-2023-32665 backport; released upstream GLib versions are unaffected.

CVSS severity5.3
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overflow in GLib GVariant deserialization allows attackers to corrupt process memory through a crafted non-normal GVariant. The g_variant_serialised_get_child function accesses a heap buffer outside its bounds while processing malformed serialized child data. Exposure requires an application to process attacker-supplied input on a distributor build carrying the earlier CVE-2023-32665 backport; released upstream GLib versions are unaffected.

The record

CVE
CVE-2023-32643
Published
Sep 14, 2023
Updated
Feb 13, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-122
Attack vector
local
Privileges
unauthenticated

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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.3Red Hat, Inc.CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow

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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