{"cve":"CVE-2021-20320","nvd":{"published":"2022-02-18T18:15:08.877","modified":"2026-10-08T21:17:33.553","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","score":5.5},"cwes":["CWE-200"],"references":["https://bugzilla.redhat.com/show_bug.cgi?id=2010090","https://lore.kernel.org/bpf/20210902185229.1840281-1-johan.almbladh%40anyfinetworks.com/","https://bugzilla.redhat.com/show_bug.cgi?id=2010090","https://lore.kernel.org/bpf/20210902185229.1840281-1-johan.almbladh%40anyfinetworks.com/"],"products":["fedoraproject:fedora","linux:linux_kernel","redhat:enterprise_linux"],"source":"nvd","synced_at":"2026-10-19T21:28:04.509275555+00:00"},"epss":{"cve":"CVE-2021-20320","score":0.0026,"percentile":0.17594,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}