{"id":"CVE-2021-20263","details":"A flaw was found in the virtio-fs shared file system daemon (virtiofsd) of QEMU. The new 'xattrmap' option may cause the 'security.capability' xattr in the guest to not drop on file write, potentially leading to a modified, privileged executable in the guest. In rare circumstances, this flaw could be used by a malicious user to elevate their privileges within the guest.","modified":"2026-03-13T00:45:13.078971Z","published":"2021-03-09T18:15:15.593Z","related":["SUSE-SU-2021:1942-1","openSUSE-SU-2021:1942-1","openSUSE-SU-2024:11287-1"],"references":[{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202208-27"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20210507-0002/"},{"type":"FIX","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1933668"},{"type":"FIX","url":"https://www.openwall.com/lists/oss-security/2021/03/08/1"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-20263.json","unresolved_ranges":[{"events":[{"introduced":"5.0.0"},{"fixed":"5.2.50"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"}]}