Critical [CVE-2025-49796] type confusion leads to denial of service (dos)
This critical-severity Red Hat Linux advisory covers CVE-2025-49796 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7 Extended Lifecycle Support, Red Hat Enterprise Linux 8.2 Advanced Update Support.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
VulniPulse record published
Summary
A vulnerability was found in libxml2. Processing certain sch:name elements from the input XML file can trigger a memory corruption issue.
This flaw allows an attacker to craft a malicious XML input file that can lead libxml to crash, resulting in a denial of service or other possible undefined behavior due to sensitive data being corrupted in memory.
The Red Hat Product Security team has evaluated this vulnerability as having an Important security impact, as libxml can be used to parse XML from the network depending on how the program consumes it using the library.
Additionally, although the initial report shows a crash due to invalid memory access (A:H), other undefined issues that can present data integrity due to the application overwriting sensitive data are not discarded (I:H). Red Hat severity: Important — CVSS 9.1 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H).
Weakness: CWE-125.
Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8.2 Advanced Update Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; and 29 more.
Is CVE-2025-49796 exploited?
No exploitation is reported in the sources VulniPulse tracks: CVE-2025-49796 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.
How do I fix CVE-2025-49796?
Upgrade to a fixed release named by Red Hat:
- libxml2-0:2.12.5-7.el10_0
- libxml2-0:2.9.1-6.el7_9.10
- libxml2-0:2.9.7-21.el8_10.1
- libxml2-0:2.9.7-9.el8_2.3
- libxml2-0:2.9.7-9.el8_4.6
- libxml2-0:2.9.7-13.el8_6.10
- libxml2-0:2.9.7-16.el8_8.9
- libxml2-0:2.9.13-10.el9_6
- libxml2-0:2.9.13-1.el9_0.5
- libxml2-0:2.9.13-3.el9_2.7
- libxml2-0:2.9.13-10.el9_4
- libxml2
38 more fixed releases are listed below.
Confirm against the vendor advisory before you patch.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.
Official advisory · high-confidence parse· fetched 17 days ago·verify at source
- libxml2-0:2.12.5-7.el10_0
- libxml2-0:2.9.1-6.el7_9.10
- libxml2-0:2.9.7-21.el8_10.1
- libxml2-0:2.9.7-9.el8_2.3
- libxml2-0:2.9.7-9.el8_4.6
- libxml2-0:2.9.7-13.el8_6.10
- libxml2-0:2.9.7-16.el8_8.9
- libxml2-0:2.9.13-10.el9_6
- libxml2-0:2.9.13-1.el9_0.5
- libxml2-0:2.9.13-3.el9_2.7
- libxml2-0:2.9.13-10.el9_4
- libxml2
- openshift/ose-rhel-coreos-8:412.86.202510291903-0
- openshift/ose-rhel-coreos-9:413.92.202510150118-0
- openshift/ose-rhel-coreos-9:414.92.202510211419-0
- openshift/ose-rhel-coreos-9:415.92.202609140326-0
- openshift/ose-rhel-coreos-9:416.94.202609011112-0
- openshift/ose-rhel-coreos-9:417.94.202510112152-0
- openshift/ose-rhel-coreos-9:418.94.202510230424-0
- openshift/ose-rhel-coreos-9:4.19.9.6.202510140714-0
- openshift/ose-rhel-coreos-9:4.20.9.6.202509251656-0
- web-terminal/web-terminal-rhel9-operator:1.11-19
- web-terminal/web-terminal-tooling-rhel9:1.11-8
- web-terminal/web-terminal-tooling-rhel9:1.12-4
- openshift-serverless-1/logic-data-index-ephemeral-rhel8:1.36.0-11
- openshift-serverless-1/logic-data-index-postgresql-rhel8:1.36.0-11
- openshift-serverless-1/logic-db-migrator-tool-rhel8:1.36.0-11
- openshift-serverless-1/logic-jobs-service-ephemeral-rhel8:1.36.0-10
- openshift-serverless-1/logic-jobs-service-postgresql-rhel8:1.36.0-10
- openshift-serverless-1/logic-kn-workflow-cli-artifacts-rhel8:1.36.0-4
- openshift-serverless-1/logic-management-console-rhel8:1.36.0-9
- openshift-serverless-1/logic-operator-bundle:1.36.0-12
- openshift-serverless-1/logic-rhel8-operator:1.36.0-18
- openshift-serverless-1/logic-swf-builder-rhel8:1.36.0-11
- openshift-serverless-1/logic-swf-devmode-rhel8:1.36.0-7
- cert-manager/jetstack-cert-manager-rhel9:v1.16.5-1760515757
- compliance/openshift-file-integrity-rhel8-operator:v1.3
- discovery/discovery-server-rhel9:2.0.1-1754478727
- libxml2-main-2.15.2-0.3.hum1
- insights-proxy/insights-proxy-container-rhel9:1.5.5-1754504343
- RHSA-2025:10630
- RHSA-2025:12240
- RHSA-2025:10698
- RHSA-2025:12237
- RHSA-2025:12241
- RHSA-2025:12098
- RHSA-2025:12239
- RHSA-2025:10699
- RHSA-2025:12099
- RHSA-2025:12199
Official advisory · high-confidence parse· fetched 17 days ago·verify at source
Mitigation checklist
- There's no available mitigation other than to avoid processing untrusted XML documents if the user is unable/unwilling to update the library.
Official advisory · high-confidence parse· fetched 17 days ago·verify at source
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