CVE-2021-33624: Debian Linux
Medium severity, CVSS 4.7. EPSS: 0.9% chance of exploitation in the next 30 days.
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.
Affected products
Published 2021-06-23. Last modified 2026-10-08.