QEMU CVE-2021-20263 Permission Bypass Vulnerability

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.

Affected Applications

QEMU

CVE References

Other References