CVE-2021-4218

Public Exploit

Description

A flaw was found in the Linux kernel’s implementation of reading the SVC RDMA counters. Reading the counter sysctl panics the system. This flaw allows a local attacker with local access to cause a denial of service while the system reboots. The issue is specific to CentOS/RHEL.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.02%
Third-Party Advisory redhat.com Third-Party Advisory centos.org Third-Party Advisory redhat.com
Affected: n/a kernel
Published at:
Updated at:

References

Link Tags
https://bugs.centos.org/view.php?id=18395 third party advisory exploit
https://bugzilla.redhat.com/show_bug.cgi?id=2048359 third party advisory issue tracking
https://access.redhat.com/security/cve/CVE-2021-4218 third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-4218?
CVE-2021-4218 has been scored as a medium severity vulnerability.
How to fix CVE-2021-4218?
To fix CVE-2021-4218, 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-2021-4218 being actively exploited in the wild?
It is possible that CVE-2021-4218 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-2021-4218?
CVE-2021-4218 affects n/a kernel.
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