CVE-2021-20320: Fedoraproject Fedora

Medium severity, CVSS 5.5. EPSS: 0.3% chance of exploitation in the next 30 days.

A flaw was found in s390 eBPF JIT in bpf_jit_insn in arch/s390/net/bpf_jit_comp.c in the Linux kernel. In this flaw, a local attacker with special user privilege can circumvent the verifier and may lead to a confidentiality problem.

Affected products

• Fedoraproject Fedora: version 34 only
• Linux Linux Kernel: before 5.15 (fixed in 5.15); version 5.15 only
• Red Hat Enterprise Linux: version 7.0 only; version 8.0 only

Published 2022-02-18. Last modified 2026-10-08.