// For flags

CVE-2024-56171

libxml2: Use-After-Free in libxml2

Severity Score

7.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track*
*SSVC
Descriptions

libxml2 before 2.12.10 and 2.13.x before 2.13.6 has a use-after-free in xmlSchemaIDCFillNodeTables and xmlSchemaBubbleIDCNodeTables in xmlschemas.c. To exploit this, a crafted XML document must be validated against an XML schema with certain identity constraints, or a crafted XML schema must be used.

A flaw was found in libxml2. This vulnerability allows a use-after-free via a crafted XML document validated against an XML schema with certain identity constraints or a crafted XML schema.

It was discovered that libxml2 incorrectly handled certain memory operations. A remote attacker could use this issue to cause libxml2 to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, and Ubuntu 18.04 LTS. It was discovered that the libxml2 xmllint tool incorrectly handled certain memory operations. If a user or automated system were tricked into running xmllint on a specially crafted xml file, a remote attacker could cause xmllint to crash, resulting in a denial of service. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, and Ubuntu 18.04 LTS.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None
Attack Vector
Local
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Local
Attack Complexity
High
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:Track*
Exploitation
None
Automatable
No
Tech. Impact
Total
* Organization's Worst-case Scenario
Timeline
  • 2024-12-18 CVE Reserved
  • 2025-02-18 CVE Published
  • 2025-03-28 CVE Updated
  • 2025-03-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-416: Use After Free
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Xmlsoft
Search vendor "Xmlsoft"
 Libxml2
Search vendor "Xmlsoft" for product "Libxml2"
 < 2.12.10
Search vendor "Xmlsoft" for product "Libxml2" and version " < 2.12.10"
en
Affected
Xmlsoft
Search vendor "Xmlsoft"
 Libxml2
Search vendor "Xmlsoft" for product "Libxml2"
 >= 2.13.0 < 2.13.6
Search vendor "Xmlsoft" for product "Libxml2" and version " >= 2.13.0 < 2.13.6"
en
Affected