CVE-2021-3428

low-risk
Published 2022-03-04

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.

Do I need to act?

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0.02% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.5/10 Medium
LOCAL / LOW complexity

Affected Products (1)

Affected Vendors

Linux

References (6)

Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1972621
Third Party Advisory https://ubuntu.com/security/CVE-2021-3428
Mailing List https://www.openwall.com/lists/oss-security/2021/03/17/1
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1972621
Third Party Advisory https://ubuntu.com/security/CVE-2021-3428
Mailing List https://www.openwall.com/lists/oss-security/2021/03/17/1
23
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal