CVE-2021-20320

MEDIUM

Linux Kernel - Exposure of Sensitive Information via s390 eBPF JIT Verifier Bypass

Title source: llm
STIX 2.1

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.

References (2)

Core 2
Core References
Issue Tracking, Third Party Advisory x_refsource_misc
https://bugzilla.redhat.com/show_bug.cgi?id=2010090

Scores

CVSS v3 5.5
EPSS 0.0009
EPSS Percentile 26.1%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Details

CWE
CWE-200
Status published
Products (5)
fedoraproject/fedora 34
linux/linux_kernel 5.15 (3 CPE variants)
linux/linux_kernel < 5.15
redhat/enterprise_linux 7.0
redhat/enterprise_linux 8.0
Published Feb 18, 2022
Tracked Since Feb 18, 2026