{"id":"CVE-2021-20257","details":"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.","modified":"2026-05-15T12:03:46.114329101Z","published":"2022-03-16T15:15:09.983Z","related":["ALSA-2021:5238","SUSE-SU-2021:1023-1","SUSE-SU-2021:1240-1","SUSE-SU-2021:1241-1","SUSE-SU-2021:1242-1","SUSE-SU-2021:1243-1","SUSE-SU-2021:1244-1","SUSE-SU-2021:1245-1","SUSE-SU-2021:1251-1","SUSE-SU-2021:1252-1","SUSE-SU-2021:1305-1","SUSE-SU-2021:14702-1","SUSE-SU-2021:14704-1","SUSE-SU-2021:14706-1","SUSE-SU-2021:1829-1","SUSE-SU-2021:1837-1","SUSE-SU-2021:1893-1","SUSE-SU-2021:1894-1","SUSE-SU-2021:1895-1","SUSE-SU-2021:1918-1","SUSE-SU-2021:1947-1","SUSE-SU-2022:1375-1","openSUSE-SU-2021:0600-1","openSUSE-SU-2021:1043-1","openSUSE-SU-2024:11287-1"],"database_specific":{"unresolved_ranges":[{"source":"CPE_FIELD","cpes":["cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*"],"extracted_events":[{"last_affected":"10.0"}],"vendor_product":"debian:debian_linux"},{"source":"CPE_FIELD","cpes":["cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*"],"extracted_events":[{"last_affected":"33"}],"vendor_product":"fedoraproject:fedora"},{"source":"CPE_FIELD","cpes":["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:*:*:*"],"extracted_events":[{"last_affected":"6.0"},{"last_affected":"8.0"},{"last_affected":"8.0"}],"vendor_product":"redhat:enterprise_linux"},{"source":"CPE_FIELD","cpes":["cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:8.0:*:*:*:*:*:*:*"],"extracted_events":[{"last_affected":"8.0"}],"vendor_product":"redhat:enterprise_linux_for_ibm_z_systems"},{"source":"CPE_FIELD","cpes":["cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:8.0:*:*:*:*:*:*:*"],"extracted_events":[{"last_affected":"8.0"}],"vendor_product":"redhat:enterprise_linux_for_power_little_endian"},{"source":"CPE_FIELD","cpes":["cpe:2.3:a:redhat:openstack_platform:10.0:*:*:*:*:*:*:*","cpe:2.3:a:redhat:openstack_platform:13.0:*:*:*:*:*:*:*"],"extracted_events":[{"last_affected":"10.0"},{"last_affected":"13.0"}],"vendor_product":"redhat:openstack_platform"}]},"references":[{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202208-27"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20220425-0003/"},{"type":"FIX","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1930087"},{"type":"FIX","url":"https://github.com/qemu/qemu/commit/3de46e6fc489c52c9431a8a832ad8170a7569bd8"},{"type":"FIX","url":"https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07428.html"},{"type":"FIX","url":"https://www.openwall.com/lists/oss-security/2021/02/25/2"}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H"}]}