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Status published
Medium
CVE-2021-20257
An infinite loop flaw was found in the e1000 NIC...
Vulnerability 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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
- https://www.openwall.com/lists/oss-security/2021/02/25/2
- https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07428.html
- https://github.com/qemu/qemu/commit/3de46e6fc489c52c9431a8a832ad8170a7569bd8
- https://bugzilla.redhat.com/show_bug.cgi?id=1930087
- https://security.netapp.com/advisory/ntap-20220425-0003/
- https://security.gentoo.org/glsa/202208-27
- https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
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Affected Vendor
Affected Software
QEMU
Vulnerable Versions:
Fixed-In v6.2.0
Timeline
Official Publish:
March 16th, 2022
Last Modified:
August 3rd, 2024
Added to House:
July 21st, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H