In Lib/tarfile.py in Python through 3.8.3, an attacker is able to craft a TAR archive leading to an infinite loop when opened by tarfile.open, because _proc_pax lacks header validation.
2.7.12-1ubuntu0~16.04.123.5.2-2ubuntu0~16.04.112.7.17-1~18.04ubuntu1.13.6.9-1~18.04ubuntu1.12.7.18-1~20.04.13.8.2-1ubuntu1.22.7.6-8ubuntu0.6+esm63.4.3-1ubuntu1~14.04.7+esm73.5.2-2ubuntu0~16.04.4~14.04.1+esm13.7.5-2ubuntu1~18.04.2+esm3Exploitability
AV:LAC:LPR:LUI:NScope
S:UImpact
C:NI:NA:HCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H