CVE-2021-20177

MediumCVSS 4.4/10Last modified Jun 17, 2026

Description

A flaw was found in the Linux kernel's implementation of string matching within a packet. A privileged user (with root or CAP_NET_ADMIN) when inserting iptables rules could insert a rule which can panic the system. Kernel before kernel 5.5-rc1 is affected.

Metrics

CVSS 3.1 4.4/10CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-125

Affected software

VendorProductVersions
n/akernelkernel 5.5-rc1

References

Timeline

Published
May 26, 2021
Last modified
Jun 17, 2026
NVD status
Modified

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