CVE-2025-49794
Libxml: heap use after free (uaf) leads to denial of service (dos)
Severity Score
9.1
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
Attend
*SSVC
Descriptions
A use-after-free vulnerability was found in libxml2. This issue occurs when parsing XPath elements under certain circumstances when the XML schematron has the <sch:name path="..."/> schema elements. This flaw allows a malicious actor to craft a malicious XML document used as input for libxml, resulting in the program's crash using libxml or other possible undefined behaviors.
Ahmed Lekssays discovered that libxml2 did not properly perform certain mathematical operations, leading to an integer overflow. An attacker could possibly use this issue to cause a crash, resulting in a denial of service, or possibly execute arbitrary code. Ahmed Lekssays discovered that libxml2 did not properly validate the size of an untrusted input stream. An attacker could possibly use this issue to cause a crash, resulting in a denial of service, or possibly execute arbitrary code.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:Attend
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2025-06-10 CVE Reserved
- 2025-06-16 CVE Published
- 2026-04-22 EPSS Updated
- 2026-05-12 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-825: Expired Pointer Dereference
CAPEC
References (29)
| URL | Tag | Source |
|---|---|---|
| https://gitlab.gnome.org/GNOME/libxml2/-/issues/931 |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Centos Search vendor "Centos" | Centos Search vendor "Centos" for product "Centos" | * | - |
Affected
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| Oracle Search vendor "Oracle" | Linux Search vendor "Oracle" for product "Linux" | * | - |
Affected
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| Red Hat Search vendor "Red Hat" | Enterprise Linux Search vendor "Red Hat" for product "Enterprise Linux" | * | - |
Affected
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| Redhat Search vendor "Redhat" | Cert-manager Operator For Red Hat Openshift Search vendor "Redhat" for product "Cert-manager Operator For Red Hat Openshift" | * | - |
Affected
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| Redhat Search vendor "Redhat" | Cert Manager Search vendor "Redhat" for product "Cert Manager" | * | - |
Affected
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| Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | * | - |
Affected
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| Redhat Search vendor "Redhat" | Insights Proxy Search vendor "Redhat" for product "Insights Proxy" | * | - |
Affected
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| Redhat Search vendor "Redhat" | Jboss Core Services Search vendor "Redhat" for product "Jboss Core Services" | * | - |
Affected
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| Redhat Search vendor "Redhat" | Openshift Search vendor "Redhat" for product "Openshift" | * | - |
Affected
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| Redhat Search vendor "Redhat" | Openshift File Integrity Operator Search vendor "Redhat" for product "Openshift File Integrity Operator" | * | - |
Affected
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| Redhat Search vendor "Redhat" | Rhel Aus Search vendor "Redhat" for product "Rhel Aus" | * | - |
Affected
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| Redhat Search vendor "Redhat" | Rhel E4s Search vendor "Redhat" for product "Rhel E4s" | * | - |
Affected
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| Redhat Search vendor "Redhat" | Rhel Eus Search vendor "Redhat" for product "Rhel Eus" | * | - |
Affected
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| Redhat Search vendor "Redhat" | Rhel Eus Long Life Search vendor "Redhat" for product "Rhel Eus Long Life" | * | - |
Affected
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| Redhat Search vendor "Redhat" | Rhel Tus Search vendor "Redhat" for product "Rhel Tus" | * | - |
Affected
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| Redhat Search vendor "Redhat" | Web Terminal Search vendor "Redhat" for product "Web Terminal" | * | - |
Affected
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| Redhat Search vendor "Redhat" | Webterminal Search vendor "Redhat" for product "Webterminal" | * | - |
Affected
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| F5 Search vendor "F5" | Big-ip Search vendor "F5" for product "Big-ip" | * | - |
Affected
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| Alma Search vendor "Alma" | Linux Search vendor "Alma" for product "Linux" | * | - |
Affected
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| Amazon Search vendor "Amazon" | Linux Search vendor "Amazon" for product "Linux" | * | - |
Affected
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| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | * | - |
Affected
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| Freebsd Search vendor "Freebsd" | Freebsd Search vendor "Freebsd" for product "Freebsd" | * | - |
Affected
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| Huawei Search vendor "Huawei" | Euleros Search vendor "Huawei" for product "Euleros" | * | - |
Affected
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| Nutanix Search vendor "Nutanix" | Ahv Search vendor "Nutanix" for product "Ahv" | * | - |
Affected
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| Nutanix Search vendor "Nutanix" | Aos Search vendor "Nutanix" for product "Aos" | * | - |
Affected
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| Opensuse Search vendor "Opensuse" | Leap Search vendor "Opensuse" for product "Leap" | * | - |
Affected
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| Oracle Search vendor "Oracle" | Linux Search vendor "Oracle" for product "Linux" | * | - |
Affected
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| Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | * | - |
Affected
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| Redhat Search vendor "Redhat" | Openshift Search vendor "Redhat" for product "Openshift" | * | - |
Affected
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| Redhat Search vendor "Redhat" | Rhel Aus Search vendor "Redhat" for product "Rhel Aus" | * | - |
Affected
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| Redhat Search vendor "Redhat" | Rhel E4s Search vendor "Redhat" for product "Rhel E4s" | * | - |
Affected
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| Redhat Search vendor "Redhat" | Rhel Els Search vendor "Redhat" for product "Rhel Els" | * | - |
Affected
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| Redhat Search vendor "Redhat" | Rhel Eus Search vendor "Redhat" for product "Rhel Eus" | * | - |
Affected
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| Redhat Search vendor "Redhat" | Rhel Eus Long Life Search vendor "Redhat" for product "Rhel Eus Long Life" | * | - |
Affected
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| Redhat Search vendor "Redhat" | Rhel Tus Search vendor "Redhat" for product "Rhel Tus" | * | - |
Affected
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| Rocky Search vendor "Rocky" | Linux Search vendor "Rocky" for product "Linux" | * | - |
Affected
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| Slackware Search vendor "Slackware" | Slackware Linux Search vendor "Slackware" for product "Slackware Linux" | * | - |
Affected
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| Suse Search vendor "Suse" | Sle-module-basesystem Search vendor "Suse" for product "Sle-module-basesystem" | * | - |
Affected
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| Suse Search vendor "Suse" | Sle-module-python3 Search vendor "Suse" for product "Sle-module-python3" | * | - |
Affected
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| Suse Search vendor "Suse" | Sle Hpc-espos Search vendor "Suse" for product "Sle Hpc-espos" | * | - |
Affected
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| Suse Search vendor "Suse" | Sle Hpc-ltss Search vendor "Suse" for product "Sle Hpc-ltss" | * | - |
Affected
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| Suse Search vendor "Suse" | Sle Hpc Search vendor "Suse" for product "Sle Hpc" | * | - |
Affected
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| Suse Search vendor "Suse" | Sled Search vendor "Suse" for product "Sled" | * | - |
Affected
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| Suse Search vendor "Suse" | Sles-ltss-extended-security Search vendor "Suse" for product "Sles-ltss-extended-security" | * | - |
Affected
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| Suse Search vendor "Suse" | Sles-ltss Search vendor "Suse" for product "Sles-ltss" | * | - |
Affected
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| Suse Search vendor "Suse" | Sles Search vendor "Suse" for product "Sles" | * | - |
Affected
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| Suse Search vendor "Suse" | Sles Sap Search vendor "Suse" for product "Sles Sap" | * | - |
Affected
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| Suse Search vendor "Suse" | Suse-manager-proxy Search vendor "Suse" for product "Suse-manager-proxy" | * | - |
Affected
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| Suse Search vendor "Suse" | Suse-manager-server Search vendor "Suse" for product "Suse-manager-server" | * | - |
Affected
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| Tencent Search vendor "Tencent" | Tencentos Server Search vendor "Tencent" for product "Tencentos Server" | * | - |
Affected
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| Uos Search vendor "Uos" | Uos Server 20 Search vendor "Uos" for product "Uos Server 20" | * | - |
Affected
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