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CVE-2021-3428

MEDIUM
5.5
CVSS Score
Published: March 4, 2022 at 05:19 PM UTC
Updated: June 17, 2026 at 04:05 AM UTC
2 products affected across 2 vendorsLinux KernelKernel

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.3%

Description

A flaw was found in the Linux kernel. A denial of service problem is identified if an extent tree is corrupted in a crafted ext4 filesystem in fs/ext4/extents.c in ext4_es_cache_extent. Fabricating an integer overflow, A local attacker with a special user privilege may cause a system crash problem which can lead to an availability threat.

Affected

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

Linux Kernel· Linux
95%
v < 5.9.0
Affected range stops below 5.9.0, so it looks safe — our inference, not a vendor statement
Kernel· Red Hat
60%
v < 5.9
Affected range stops below 5.9, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (3)

x_refsource_MISCIssue TrackingPermissions RequiredThird Party Advisory
Source: [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=1972621
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://ubuntu.com/security/CVE-2021-3428
x_refsource_MISCMailing ListThird Party Advisory
Source: [email protected]
https://www.openwall.com/lists/oss-security/2021/03/17/1

CVSS

5.5MEDIUM[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-190

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