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CVE-2021-4218

Published: Aug 24, 2022Updated: Nov 21, 2024 Sources: CVE List NVD BDUCWE-665
NVD MITRE
5.5CVSSMEDIUM
EPSS Score
0.3%
Top 79.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

A flaw was found in the Linux kernel’s implementation of reading the SVC RDMA counters. Reading the counter sysctl panics the system. This flaw allows a local attacker with local access to cause a denial of service while the system reboots. The issue is specific to CentOS/RHEL.

CVSS Vector Breakdown

AV:LAC:LPR:LUI:NS:UC:NI:NA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-665

Affected Products

Astra Linux Special Edition для «Эльбрус»ООО «РусБИТех-Астра»
On-premOS
Operating Systems / linux-distro
CentOSThe CentOS Project
On-premOS
Operating Systems / linux-distro
LinuxСообщество свободного программного обеспечения
On-premOS
Operating Systems / linux-distro
kerneln/a
linux kernellinux
On-premOS
Operating Systems
ооо «русбитех-астра»commercialRUOperating Systemsaka rusbitech-astra
the centos projectoss-projectUSOperating Systemsaka centos
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
linuxoss-projectOperating Systemsaka the linux kernel

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

https://access.redhat.com/security/cve/cve-2021-4218
access.redhat.com
https://www.cnx-software.com/html/Linux-5.9-Changelog.txt
cnx-software.com
https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg2183353.html
mail-archive.com
and 6 more references View all →

Timeline

Published
Aug 24, 2022
Last Updated
Nov 21, 2024

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