CVE-2021-4218 — MEDIUM (5.5)

Vulnerability 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.

CVSS Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Linux	Linux Kernel	-

Related Weaknesses (CWE)

CWE-665

References

https://access.redhat.com/security/cve/CVE-2021-4218Third Party Advisory
https://bugs.centos.org/view.php?id=18395ExploitThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2048359Issue TrackingThird Party Advisory
https://access.redhat.com/security/cve/CVE-2021-4218Third Party Advisory
https://bugs.centos.org/view.php?id=18395ExploitThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2048359Issue TrackingThird Party Advisory

FAQ

What is CVE-2021-4218?

CVE-2021-4218 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 den...

How severe is CVE-2021-4218?

CVE-2021-4218 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-4218?

Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.