CVE-2021-20320

MediumCVSS 5.5/10Last modified Oct 8, 2026

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.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-200

Affected software

Vendor	Product	Versions
n/a	kernel	kernel 5.15 rc3

References

https://bugzilla.redhat.com/show_bug.cgi?id=2010090Issue Tracking, Third Party Advisory
https://lore.kernel.org/bpf/20210902185229.1840281-1-johan.almbladh%40anyfinetworks.com/
https://bugzilla.redhat.com/show_bug.cgi?id=2010090Issue Tracking, Third Party Advisory
https://lore.kernel.org/bpf/20210902185229.1840281-1-johan.almbladh%40anyfinetworks.com/

Timeline

Published: Feb 18, 2022
Last modified: Oct 8, 2026
NVD status: Modified

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