CVEvulnerability

CVE-2021-20177

4.4 MEDIUM Published 2021-05-26 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2021-05-26
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
4.4 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0 ([email protected])
2.1 LOW — AV:L/AC:L/Au:N/C:N/I:N/A:P
Weaknesses
CWE-125

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.

Affected configurations

• linux linux kernel (<= 5.4.9)

Related

Weakness · CWE (1)

  • CWE-125 Out-of-bounds Read weakness

References