{"id":"CVE-2026-63622","title":"A flaw was found in libvirt","summary":"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 `sw…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-59"],"vendor":"Red Hat","product":"libvirt","affected":["libvirt (all versions)","libvirt (all versions)","virt:rhel (all versions)","virt:rhel (all versions)","virt:rhel (all versions)","virt:rhel (all versions)","virt:rhel (all versions)","virt:rhel (all versions)","libvirt (all versions)","libvirt (all versions)","libvirt (all versions)","libvirt (all versions)","libvirt","virt:rhel/libvirt (all versions)","libvirt (all versions)","libvirt"],"patched":["enterprise_linux_appstream_eus_v_10_0","enterprise_linux_codeready_linux_builder_eus_v_10_0"],"published":"2026-08-10","updated":"2026-09-21","sourceUpdated":"2026-09-21T06:17:01.757","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-63622","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:64773","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:65515","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:65516","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:65803","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:68513","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:68594","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:69114","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:69131","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-63622","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2513065","label":"secalert@redhat.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-63622.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-63622"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63622"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-08-11T17:13:19.056016Z"},"epss":0.00184,"epssPercentile":0.07089,"ingestedAt":"2026-09-08T15:33:26.952Z","slug":"CVE-2026-63622","body":"## Overview\n\nA 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **RHSA-2026:64773** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) · released 2026-09-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:64773)\n- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux for NVIDIA 26 · no fix planned: Red Hat Enterprise Linux for NVIDIA 26, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-63622.json)\n- **RHSA-2026:65516** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.2) · released 2026-09-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:65516)\n- **RHSA-2026:65515** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v.9.6), Red Hat CodeReady Linux Builder EUS (v.9.6) · released 2026-09-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:65515)\n- **RHSA-2026:65803** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.4) · released 2026-09-09 · [advisory](https://access.redhat.com/errata/RHSA-2026:65803)\n- **RHSA-2026:68594** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) · released 2026-09-17 · [advisory](https://access.redhat.com/errata/RHSA-2026:68594)\n- **RHSA-2026:68513** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8) · released 2026-09-17 · [advisory](https://access.redhat.com/errata/RHSA-2026:68513)\n- **RHSA-2026:69114** · Red Hat · fixed in: Red Hat Enterprise Linux Server (v. 7 ELS), Red Hat Enterprise Linux Server Optional (v. 7 ELS) · released 2026-09-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:69114)\n- **RHSA-2026:69131** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) · released 2026-09-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:69131)","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}