CVE-2024-45491: n/a
An issue was discovered in libexpat before 2.6.3. dtdCopy in xmlparse.c can have an integer overflow for nDefaultAtts on 32-bit platforms (where UINT_MAX equals SIZE_MAX).
AI Analysis
Technical Summary
CVE-2024-45491 describes an integer overflow vulnerability in the libexpat XML parsing library prior to version 2.6.3. Specifically, the dtdCopy function in xmlparse.c can overflow the nDefaultAtts variable on 32-bit platforms where UINT_MAX equals SIZE_MAX. This integer overflow may lead to memory corruption, potentially impacting confidentiality, integrity, and availability of applications using the affected library. The vulnerability has a CVSS 3.1 score of 7.3, reflecting a high severity level with network attack vector and no required privileges or user interaction.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to cause memory corruption, which may lead to denial of service or potentially other impacts on confidentiality and integrity of the affected system. The vulnerability affects 32-bit platforms using libexpat versions before 2.6.3.
Mitigation Recommendations
A fix is available in libexpat version 2.6.3. Users and maintainers of libexpat should upgrade to version 2.6.3 or later to remediate this vulnerability. No vendor advisory was provided, so patch status is based on the version information given.
CVE-2024-45491: n/a
Description
An issue was discovered in libexpat before 2.6.3. dtdCopy in xmlparse.c can have an integer overflow for nDefaultAtts on 32-bit platforms (where UINT_MAX equals SIZE_MAX).
CVSS v3.1
Score 7.3high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2024-45491 describes an integer overflow vulnerability in the libexpat XML parsing library prior to version 2.6.3. Specifically, the dtdCopy function in xmlparse.c can overflow the nDefaultAtts variable on 32-bit platforms where UINT_MAX equals SIZE_MAX. This integer overflow may lead to memory corruption, potentially impacting confidentiality, integrity, and availability of applications using the affected library. The vulnerability has a CVSS 3.1 score of 7.3, reflecting a high severity level with network attack vector and no required privileges or user interaction.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to cause memory corruption, which may lead to denial of service or potentially other impacts on confidentiality and integrity of the affected system. The vulnerability affects 32-bit platforms using libexpat versions before 2.6.3.
Mitigation Recommendations
A fix is available in libexpat version 2.6.3. Users and maintainers of libexpat should upgrade to version 2.6.3 or later to remediate this vulnerability. No vendor advisory was provided, so patch status is based on the version information given.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2024-08-30T00:00:00.000Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 690a2dfef0ba78a050538c68
Added to database: 11/04/2025, 16:46:54 UTC
Last enriched: 07/15/2026, 11:27:35 UTC
Last updated: 09/10/2026, 19:36:48 UTC
Views: 240
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