{"id":"CVE-2019-20812","details":"An issue was discovered in the Linux kernel before 5.4.7. The prb_calc_retire_blk_tmo() function in net/packet/af_packet.c can result in a denial of service (CPU consumption and soft lockup) in a certain failure case involving TPACKET_V3, aka CID-b43d1f9f7067.","modified":"2026-03-12T23:12:34.590164Z","published":"2020-06-03T03:15:10.597Z","related":["SUSE-SU-2020:1587-1","SUSE-SU-2020:1599-1","SUSE-SU-2020:1602-1","SUSE-SU-2020:1603-1","SUSE-SU-2020:1604-1","SUSE-SU-2020:1605-1","SUSE-SU-2020:1663-1","SUSE-SU-2020:2027-1","SUSE-SU-2020:2105-1","SUSE-SU-2020:2134-1","SUSE-SU-2020:2152-1","SUSE-SU-2020:2156-1","SUSE-SU-2020:2478-1","SUSE-SU-2020:2487-1","openSUSE-SU-2020:0801-1","openSUSE-SU-2020:0935-1","openSUSE-SU-2021:0242-1"],"references":[{"type":"WEB","url":"https://www.oracle.com/security-alerts/cpuApr2021.html"},{"type":"WEB","url":"http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html"},{"type":"WEB","url":"http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.html"},{"type":"ADVISORY","url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.7"},{"type":"FIX","url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b43d1f9f7067c6759b1051e8ecb84e82cef569fe"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2019-20812.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"5.4.7"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}