CVEvulnerability
CVE-2021-20257
6.5 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2022-03-16
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 6.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
- CVSS 2.0 ([email protected])
- 2.1 LOW — AV:L/AC:L/Au:N/C:N/I:N/A:P
- Weaknesses
- CWE-835
Description
An infinite loop flaw was found in the e1000 NIC emulator of the QEMU. This issue occurs while processing transmits (tx) descriptors in process_tx_desc if various descriptor fields are initialized with invalid values. This flaw allows a guest to consume CPU cycles on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
Affected configurations
• qemu qemu (< 6.2.0)
• fedoraproject fedora 33
• redhat openstack platform 10.0
• redhat openstack platform 13.0
• redhat enterprise linux 6.0
• redhat enterprise linux 8.0
• redhat enterprise linux for ibm z systems 8.0
• redhat enterprise linux for power little endian 8.0
• redhat codeready linux builder
• debian debian linux 10.0
Related
Weakness · CWE (1)
- CWE-835 Loop with Unreachable Exit Condition weakness
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1930087 Issue Tracking, Patch, Third Party Advisory
- https://github.com/qemu/qemu/commit/3de46e6fc489c52c9431a8a832ad8170a7569bd8 Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html Mailing List, Third Party Advisory
- https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07428.html Mailing List, Patch, Vendor Advisory
- https://security.gentoo.org/glsa/202208-27 Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220425-0003/ Third Party Advisory
- https://www.openwall.com/lists/oss-security/2021/02/25/2 Mailing List, Patch, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1930087 Issue Tracking, Patch, Third Party Advisory
- https://github.com/qemu/qemu/commit/3de46e6fc489c52c9431a8a832ad8170a7569bd8 Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html Mailing List, Third Party Advisory
- https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07428.html Mailing List, Patch, Vendor Advisory
- https://security.gentoo.org/glsa/202208-27 Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220425-0003/ Third Party Advisory
- https://www.openwall.com/lists/oss-security/2021/02/25/2 Mailing List, Patch, Third Party Advisory