CVE-2021-20257

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.

Link	Resource
https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07428.html	Mailing List Patch
https://github.com/qemu/qemu/commit/3de46e6fc489c52c9431a8a832ad8170a7569bd8	Patch Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1930087	Issue Tracking Patch
https://www.openwall.com/lists/oss-security/2021/02/25/2	Mailing List Patch
https://security.netapp.com/advisory/ntap-20220425-0003/	Third Party Advisory
https://security.gentoo.org/glsa/202208-27	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html	Mailing List Third Party Advisory

Configuration 1

cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:* cpe:2.3:a:redhat:openstack_platform:13.0:*:*:*:*:*:*:* cpe:2.3:a:redhat:openstack_platform:10.0:*:*:*:*:*:*:* cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:8.0:*:*:*:*:*:*:* cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:8.0:*:*:*:*:*:*:* cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

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Published : 2022-03-16 03:15

Updated : 2023-02-12 10:15

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NVD link : CVE-2021-20257

Mitre link : CVE-2021-20257

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CWE-835