CVE-2021-4148

low-risk
Published 2022-03-23

A vulnerability was found in the Linux kernel's block_invalidatepage in fs/buffer.c in the filesystem. A missing sanity check may allow a local attacker with user privilege to cause a denial of service (DOS) problem.

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 (2)

Affected Vendors

Linux Fedoraproject

References (6)

Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=2026487
Exploit https://lkml.org/lkml/2021/9/12/323
Exploit https://lkml.org/lkml/2021/9/17/1037
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=2026487
Exploit https://lkml.org/lkml/2021/9/12/323
Exploit https://lkml.org/lkml/2021/9/17/1037
25
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 7/34 · Low