VYPR
Medium severity6.5NVD Advisory· Published Mar 16, 2022· Updated Jun 17, 2026

CVE-2021-20257

CVE-2021-20257

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.

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Affected products

167

Patches

Vulnerability mechanics

References

7

News mentions

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