VULNERABILITY INTELLIGENCE

CVE-2021-20263

CVSS score3.3 LOW
EPSS probability0.38%
CISA KEVNot currently listed
Published2021-03-09
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Description

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.

Weakness classification

  • secalert@redhat.com: CWE-281
  • nvd@nist.gov: CWE-281

Primary references