What’s Vulnerable › Vulnerabilities

CVE-2021-4218

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-08-24 · updated 2026-06-17
• Weakness: CWE-665

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

• Linux kernel: all versions

References

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

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