Vulnerability · Published Aug 24, 2022 · Assigned by redhat

CVE-2021-4218

Medium 5.5

In plain English

A medium-severity security flaw in kernel. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities).

Severity (CVSS NVD)5.5Medium

Exploit odds (30 days)0.3%top 76.7% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
n/a	kernel	NA

Weakness: CWE-665

References

https://bugs.centos.org/view.php?id=18395 x_refsource_MISC
https://bugzilla.redhat.com/show_bug.cgi?id=2048359 x_refsource_MISC
https://access.redhat.com/security/cve/CVE-2021-4218 x_refsource_MISC