CVE-2021-3501

HIGH
7.1
CVSS Score
Published: May 5, 2021 at 10:31 PM UTC
Updated: August 5, 2026 at 10:17 PM UTC
27 products affected across 4 vendorsLinux KernelFedoraEnterprise Linux

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Severity
HIGH7.1
Exploit prediction
EPSS 0.4%

Description

A 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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 5.125.11 ≤ v < 5.11.165.9 ≤ v < 5.10.325.115.9
Affected range stops below 5.10.32, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.11.16, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.12, so it looks safe — our inference, not a vendor statement
All versions
All versions
netapp-h300e (same device)
All versions
netapp-h300s (same device)
All versions
netapp-h410c (same device)
All versions
netapp-h410s (same device)
All versions
netapp-h500e (same device)
All versions
netapp-h500s (same device)
All versions
netapp-h700e (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-787

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