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.
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.7
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.html
Source: MITRE
Published: 2020-06-03
Updated: 2021-06-14
Type: CWE-400
Base Score: 4.9
Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C
Impact Score: 6.9
Exploitability Score: 3.9
Severity: MEDIUM
Base Score: 5.5
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Impact Score: 3.6
Exploitability Score: 1.8
Severity: MEDIUM