CVE-2021-4148

Public Exploit

Description

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.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.01%
Third-Party Advisory redhat.com Third-Party Advisory lkml.org Third-Party Advisory lkml.org
Affected: n/a kernel
Published at:
Updated at:

References

Link Tags
https://bugzilla.redhat.com/show_bug.cgi?id=2026487 issue tracking third party advisory
https://lkml.org/lkml/2021/9/12/323 mailing list patch exploit third party advisory
https://lkml.org/lkml/2021/9/17/1037 mailing list patch exploit third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-4148?
CVE-2021-4148 has been scored as a medium severity vulnerability.
How to fix CVE-2021-4148?
To fix CVE-2021-4148, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-4148 being actively exploited in the wild?
It is possible that CVE-2021-4148 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-4148?
CVE-2021-4148 affects n/a kernel.
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