CVEvulnerability
CVE-2021-20263
3.3 LOW
Official page ↗
- Status
- Modified
- Published
- 2021-03-09
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 3.3 LOW — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- CVSS 2.0 ([email protected])
- 2.1 LOW — AV:L/AC:L/Au:N/C:N/I:P/A:N
- Weaknesses
- CWE-281
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 configurations
• qemu qemu (>= 5.0.0 < 5.2.50)
Related
Weakness · CWE (1)
- CWE-281 Improper Preservation of Permissions weakness
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1933668 Issue Tracking, Patch, Third Party Advisory
- https://security.gentoo.org/glsa/202208-27 Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210507-0002/ Third Party Advisory
- https://www.openwall.com/lists/oss-security/2021/03/08/1 Mailing List, Patch, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1933668 Issue Tracking, Patch, Third Party Advisory
- https://security.gentoo.org/glsa/202208-27 Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210507-0002/ Third Party Advisory
- https://www.openwall.com/lists/oss-security/2021/03/08/1 Mailing List, Patch, Third Party Advisory