Vulnerability Details : CVE-2021-4218
Potential exploit
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.
Vulnerability category: Denial of service
Products affected by CVE-2021-4218
- cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-4218
0.02%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 3 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-4218
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
NIST |
CWE ids for CVE-2021-4218
-
The product does not initialize or incorrectly initializes a resource, which might leave the resource in an unexpected state when it is accessed or used.Assigned by:
- nvd@nist.gov (Primary)
- secalert@redhat.com (Secondary)
-
The product accesses or uses a pointer that has not been initialized.Assigned by: secalert@redhat.com (Secondary)
References for CVE-2021-4218
-
https://bugs.centos.org/view.php?id=18395
0018395: CVE- sysctl parameter read causes kernel panic ( rpcrdma module ) - CentOS Bug TrackerExploit;Third Party Advisory
-
https://bugzilla.redhat.com/show_bug.cgi?id=2048359
2048359 – (CVE-2021-4218) CVE-2021-4218 kernel: sysctl parameter read causes kernel panic ( rpcrdma module )Issue Tracking;Third Party Advisory
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https://access.redhat.com/security/cve/CVE-2021-4218
CVE-2021-4218- Red Hat Customer PortalThird Party Advisory
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