In kernel/bpf/verifier.c in the Linux kernel before 5.12.13, a branch can be mispredicted (e.g., because of type confusion) and consequently an unprivileged BPF program can read arbitrary memory locations via a side-channel attack, aka CID-9183671af6db.
5.3.0-18.195.3.0-24.265.4.0-18.225.4.0-21.255.4.0-24.285.4.0-25.295.4.0-26.305.4.0-28.325.4.0-29.335.4.0-31.35+32 more5.4.0-88.995.13.0-19.196.11.0-8.86.5.0-9.94.2.0-16.194.2.0-17.214.2.0-19.234.3.0-1.104.3.0-2.114.3.0-5.164.3.0-6.174.3.0-7.184.4.0-10.254.4.0-101.124+167 more4.13.0-16.194.13.0-17.204.13.0-25.294.13.0-32.354.15.0-10.114.15.0-101.1024.15.0-106.1074.15.0-108.1094.15.0-109.1104.15.0-111.112+130 more3.11.0-12.196.5.0-1008.85.3.0-1003.35.3.0-1008.95.3.0-1009.105.3.0-1010.115.4.0-1005.55.4.0-1007.75.4.0-1008.85.4.0-1009.95.4.0-1011.115.4.0-1015.15+26 more5.4.0-1057.604.4.0-1002.24.4.0-1003.34.4.0-1005.54.4.0-1006.64.4.0-1009.94.4.0-1010.104.4.0-1011.114.4.0-1012.124.4.0-1014.144.4.0-1016.16+94 moreExploitability
AV:LAC:HPR:LUI:NScope
S:UImpact
C:HI:NA:NCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N