{"id":"CVE-2026-63623","title":"Libvirt: information disclosure via world-readable storage volume images during clone/convert","summary":"A flaw was found in libvirt. During storage volume clone or convert operations, newly created volume images were temporarily world-readable. This was caused by the `qemu-img` utility running with overly permissive file creation settings,…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","cvssSource":"cna","cwe":["CWE-732"],"vendor":"Red Hat","product":"libvirt","affected":["libvirt (all versions)","libvirt (all versions)","libvirt (all versions)","virt:rhel/libvirt (all versions)","libvirt (all versions)","libvirt"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-08-10T18:30:24.800409Z"},"published":"2026-08-10","updated":"2026-11-05","sourceUpdated":"2026-11-05T21:53:14.120Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-63623","references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-63623"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2513066","label":"RHBZ#2513066"}],"tags":["cve.org"],"epss":0.00096,"epssPercentile":0.00664,"ingestedAt":"2026-11-05T23:41:31.961Z","slug":"CVE-2026-63623","body":"## Overview\n\nA flaw was found in libvirt. During storage volume clone or convert operations, newly created volume images were temporarily world-readable. This was caused by the `qemu-img` utility running with overly permissive file creation settings, allowing any local user to read the full guest disk contents. This vulnerability could lead to sensitive information disclosure from guest virtual machines.\n\n## Affected\n\n- `libvirt (all versions)`\n- `libvirt (all versions)`\n- `libvirt (all versions)`\n- `virt:rhel/libvirt (all versions)`\n- `libvirt (all versions)`\n- `libvirt`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n### Workarounds\n\nMitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}