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CVE-2021-4090

An out-of-bounds (OOB) memory write flaw was found in the NFSD in the Linux kernel. Missing sanity may lead to a write beyond bmval[bmlen-1] in nfsd4_decode_bitmap4 in fs/nfsd/nfs4xdr.c. In this fl...

Published: Feb 18, 2022Updated: Aug 25, 2026 Sources: CVE List NVD BDU csafCWE-787
7.1HIGH
NVD MITRE
EPSS Score
0.3%
Top 72.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

Multiple vulnerabilities have been identified in the additional GNU/Linux subsystem of the SIMATIC S7-1500 TM MFP V1.1. Siemens is preparing fix versions and recommends specific countermeasures for products where fixes are not, or not yet available.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:LPR:LUI:NS:UC:HI:HA:N
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-787

Affected Products

netapp
commercial·US
h300s firmware
Hardware Firmware
h500s firmware
Hardware Firmware
h700s firmware
Hardware Firmware
h300e firmware
Hardware Firmware
h500e firmware
Hardware Firmware
h700e firmware
Hardware Firmware
h410s firmware
Hardware Firmware
h410c firmware
Hardware Firmware
NetApp Inc.
commercial·USaka netapp
NetApp HCI Baseboard Management Controller H410C
Hardware Firmware
NetApp HCI Baseboard Management Controller H300S
Hardware Firmware
NetApp HCI Baseboard Management Controller H500S
Hardware Firmware
NetApp HCI Baseboard Management Controller H700S
Hardware Firmware
NetApp HCI Baseboard Management Controller H300E
Hardware Firmware
NetApp HCI Baseboard Management Controller H500E
Hardware Firmware
NetApp HCI Baseboard Management Controller H700E
Hardware Firmware
NetApp HCI Baseboard Management Controller H410S
Hardware Firmware
Linux
oss-projectaka the linux kernel
linux kernelOn-premOS
Operating Systems
kernelOn-prem
Operating Systems / linux-distro
Сообщество свободного программного обеспечения
oss-projectaka fsf
Debian GNU/LinuxOn-premOS
Operating Systems / linux-distro
LinuxOn-premOS
Operating Systems / linux-distro
АО «НППКТ»
commercial·RU
ОСОН ОСнова ОnyxOn-premOS
Operating Systems / linux-distro

Exploitability

Official Patch Available
Is your org exposed to CVE-2021-4090?Request an assessment to establish which checks are appropriate for your systems. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://cert-portal.siemens.com/productcert/csaf/ssa-265688.json
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/html/ssa-265688.html
cert-portal.siemens.com
https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2024/icsa-24-102-01.json
raw.githubusercontent.com
and 592 more references View all →

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