Red Hat Security Advisory: libvirt security update
Kernel-based Virtual Machine (KVM) offers a full virtualization solution forLinux on numerous hardware platforms. The virt:rhel module contains packageswhich provide user-space components used to run virtual machines using KVM.The packages also provide APIs for managing and interacting with the virtualized systems. Security Fix(es): * libvirt: Denial of service in XML parsing (CVE-2025-12748) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 10 Release Notes linked from the References section.
AI Analysis
Technical Summary
The libvirt virtualization management library used in Red Hat Enterprise Linux 10 contains a denial of service vulnerability in its XML parsing functionality (CVE-2025-12748). This vulnerability could allow an attacker to cause a denial of service by triggering a crash in libvirt components that manage virtual machines. The issue is rated as moderate severity by Red Hat Product Security. An update fixing this vulnerability is available as part of the Red Hat Enterprise Linux 10.2 release and related package updates.
Potential Impact
Successful exploitation of this vulnerability results in denial of service conditions affecting libvirt user-space components that manage KVM virtual machines. This can disrupt virtualization management operations and potentially impact hosted virtual machines indirectly. There are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released an official security update for libvirt in Red Hat Enterprise Linux 10. Users should apply the provided update as detailed in Red Hat advisory RHSA-2026:18326 and the linked update instructions (https://access.redhat.com/articles/11258). Applying this update mitigates the vulnerability. No additional action is required beyond installing the update.
Red Hat Security Advisory: libvirt security update
Description
Kernel-based Virtual Machine (KVM) offers a full virtualization solution forLinux on numerous hardware platforms. The virt:rhel module contains packageswhich provide user-space components used to run virtual machines using KVM.The packages also provide APIs for managing and interacting with the virtualized systems. Security Fix(es): * libvirt: Denial of service in XML parsing (CVE-2025-12748) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 10 Release Notes linked from the References section.
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The libvirt virtualization management library used in Red Hat Enterprise Linux 10 contains a denial of service vulnerability in its XML parsing functionality (CVE-2025-12748). This vulnerability could allow an attacker to cause a denial of service by triggering a crash in libvirt components that manage virtual machines. The issue is rated as moderate severity by Red Hat Product Security. An update fixing this vulnerability is available as part of the Red Hat Enterprise Linux 10.2 release and related package updates.
Potential Impact
Successful exploitation of this vulnerability results in denial of service conditions affecting libvirt user-space components that manage KVM virtual machines. This can disrupt virtualization management operations and potentially impact hosted virtual machines indirectly. There are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released an official security update for libvirt in Red Hat Enterprise Linux 10. Users should apply the provided update as detailed in Red Hat advisory RHSA-2026:18326 and the linked update instructions (https://access.redhat.com/articles/11258). Applying this update mitigates the vulnerability. No additional action is required beyond installing the update.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:18748
- Cve Count
- 1
- Additional Cves
- []
- Cvss Version
- null
Threat ID: 6a3da1c64853345fc18204a7
Added to database: 06/25/2026, 21:46:46 UTC
Last enriched: 07/12/2026, 10:06:29 UTC
Last updated: 08/16/2026, 15:58:22 UTC
Views: 97
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