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This allows for privilege escalation from the `swtpm` sandbox to root-level file ownership control."}], "id": "CVE-2026-63622", "lastModified": "2026-09-09T07:16:56.637", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "secalert@redhat.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-63622", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-08-11T17:13:19.056016Z", "version": "2.0.3"}}]}, "published": "2026-08-10T21:17:23.550", "references": [{"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:64773"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:65515"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:65516"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:65803"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/security/cve/CVE-2026-63622"}, {"source": "secalert@redhat.com", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2513065"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-59"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

{"acknowledgement": "Red Hat would like to thank HE WEI (gikaku) for reporting this issue.", "bugzilla": {"description": "libvirt: swtpm privilege escalation via symlink following", "id": "2513065", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2513065"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-59", "details": ["A flaw was found in libvirt. A local attacker, specifically a process running as the confined `swtpm` user, could exploit a symlink-following vulnerability in the `virFileChownFiles()` function. By planting a symbolic link within the `swtpm` state directory, the attacker could trick the root-level libvirt daemon into changing the ownership of an arbitrary file to the `swtpm` user. This allows for privilege escalation from the `swtpm` sandbox to root-level file ownership control."], "mitigation": {"lang": "en:us", "value": "If virtual Trusted Platform Module (vTPM) functionality is not required, remove the <tpm> device definition from the domain XML configuration to prevent the vulnerable code path from being reached.\nTo check if a domain uses vTPM:\n```\nvirsh dumpxml <domain> | grep -A5 '<tpm'\n```\nTo remove it, edit the domain XML and delete the <tpm> block. This prevents libvirt from spawning swtpm processes and from calling virFileChownFiles() on the swtpm state directory during domain startup. Domains that require vTPM for guest OS functionality cannot use this mitigation and should prioritize applying the upstream fix."}, "name": "CVE-2026-63622", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "libvirt", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "libvirt", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "libvirt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "virt:rhel/libvirt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "libvirt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:enterprise_linux_nvidia:", "fix_state": "Out of support scope", "package_name": "libvirt", "product_name": "Red Hat Enterprise Linux for NVIDIA 26"}], "public_date": "2026-07-30T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-63622\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-63622"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 80.0, "confidence_source": "inferred", "scores": [{"score": 80.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "product": "libvirt", "vendor": "libvirt"}, {"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "Red Hat Enterprise Linux 10", "source": "cna", "vendor": "Red Hat"}, "product": "enterprise_linux", "vendor": "redhat"}, {"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 89.0, "confidence_source": "matching", "scores": [{"score": 89.0, "source": "matching"}]}, "original": {"product": "Red Hat Enterprise Linux for NVIDIA 26", "source": "cna", "vendor": "Red Hat"}, "product": "enterprise_linux_for_nvidia_26", "vendor": "redhat"}], "created": "2026-08-10T22:45:05.169226+00:00", "updated": "2026-08-11T14:21:42.396002+00:00", "vendors": ["libvirt", "libvirt$PRODUCT$libvirt", "redhat", "redhat$PRODUCT$enterprise_linux", "redhat$PRODUCT$enterprise_linux_for_nvidia_26"]}