vulnerability

Red Hat: CVE-2021-20263: QEMU: virtiofsd: 'security.capabilities' is not dropped with xattrmap option

Name: Red Hat: CVE-2021-20263: QEMU: virtiofsd: 'security.capabilities' is not dropped with xattrmap option
Creator: Red Hat
Published: 2021-03-09T00:00:00.000Z
Keywords: CVE, Red Hat, 2021, 20263, QEMU, no-fix-redhat-rpm-package, Severity 2

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Severity

CVSS

(AV:L/AC:L/Au:N/C:N/I:P/A:N)

Published

Mar 9, 2021

Added

Jul 9, 2025

Modified

Jul 9, 2025

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.

Solution

no-fix-redhat-rpm-package

References

NVD-CVE-2021-20263

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