CVE-2021-3501

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Summary

CVECVE-2021-3501
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-05-06 13:15:12 UTC
Updated2026-08-05 22:17:05 UTC
DescriptionA flaw was found in the Linux kernel in versions before 5.12. The value of internal.ndata, in the KVM API, is mapped to an array index, which can be updated by a user process at anytime which could lead to an out-of-bounds write. The highest threat from this vulnerability is to data integrity and system availability.

Risk And Classification

Primary CVSS: v3.1 7.1 HIGH from [email protected]

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

EPSS: 0.003740000 probability, percentile 0.301770000 (date 2026-08-09)

Problem Types: CWE-787 | CWE-787 CWE-787

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.1HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
2.0[email protected]Primary3.6AV:L/AC:L/Au:N/C:N/I:P/A:P

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
High

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

CVSS v2.0 Breakdown

Access Vector
Local
Access Complexity
Low
Authentication
None
Confidentiality
None
Integrity
Partial
Availability
Partial

AV:L/AC:L/Au:N/C:N/I:P/A:P

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Fedoraproject Fedora 33 All All All
Operating System Linux Linux Kernel All All All All
Application Netapp Cloud Backup - All All All
Hardware Netapp H300e - All All All
Operating System Netapp H300e Firmware - All All All
Hardware Netapp H300s - All All All
Operating System Netapp H300s Firmware - All All All
Hardware Netapp H410c - All All All
Operating System Netapp H410c Firmware - All All All
Hardware Netapp H410s - All All All
Operating System Netapp H410s Firmware - All All All
Hardware Netapp H500e - All All All
Operating System Netapp H500e Firmware - All All All
Hardware Netapp H500s - All All All
Operating System Netapp H500s Firmware - All All All
Hardware Netapp H700e - All All All
Operating System Netapp H700e Firmware - All All All
Hardware Netapp H700s - All All All
Operating System Netapp H700s Firmware - All All All
Operating System Netapp Solidfire Baseboard Management Controller Firmware - All All All
Operating System Redhat Enterprise Linux 8.0 All All All
Operating System Redhat Enterprise Linux 8.0 All All All
Operating System Redhat Enterprise Linux For Real Time 8 All All All
Operating System Redhat Enterprise Linux For Real Time For Nfv 8 All All All
Operating System Redhat Enterprise Linux For Real Time For Nfv Tus 8.4 All All All
Operating System Redhat Enterprise Linux For Real Time Tus 8.4 All All All
Application Redhat Virtualization 4.0 All All All
Application Redhat Virtualization Host 4.0 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Kernel affected 5.9 5.10.32 semver Not specified
CNA Linux Kernel affected 5.11 5.11.16 semver Not specified

References

ReferenceSourceLinkTags
kernel/git/torvalds/linux.git - Linux kernel source tree af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Mailing List, Patch, Vendor Advisory
CVE-2021-3501 Linux Kernel Vulnerability in NetApp Products | NetApp Product Security af854a3a-2127-422b-91ae-364da2661108 security.netapp.com Third Party Advisory
1950136 – (CVE-2021-3501) CVE-2021-3501 kernel: userspace applications can misuse the KVM API to cause a write of 16 bytes at an offset up to 32 GB from vcpu->run af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com Issue Tracking, Patch, Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 159239 Oracle Enterprise Linux Security Update for kernel (ELSA-2021-2168)
  • 180455 Debian Security Update for linux (CVE-2021-3501)
  • 198396 Ubuntu Security Notification for Linux kernel vulnerabilities (USN-4977-1)
  • 198402 Ubuntu Security Notification for Linux kernel (OEM) vulnerabilities (USN-4983-1)
  • 239379 Red Hat Update for kernel (RHSA-2021:2168)
  • 239448 Red Hat Update for kpatch-patch (RHSA-2021:2165)
  • 239454 Red Hat Update for kernel-rt (RHSA-2021:2169)
  • 353159 Amazon Linux Security Advisory for kernel : ALAS2KERNEL-5.10-2022-001
  • 6140243 AWS Bottlerocket Security Update for kernel (GHSA-57hf-5hq2-ff32)
  • 900096 CBL-Mariner Linux Security Update for kernel 5.10.52.1
  • 900304 CBL-Mariner Linux Security Update for kernel 5.10.57.1
  • 900319 CBL-Mariner Linux Security Update for kernel 5.10.60.1
  • 901036 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (6569-1)
  • 903061 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (4184)
  • 906199 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (4184-1)
  • 940125 AlmaLinux Security Update for kernel (ALSA-2021:2168)
  • 960066 Rocky Linux Security Update for kernel (RLSA-2021:2168)

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