CVE-2021-3923: Fedoraproject Fedora

Low severity, CVSS 2.3. EPSS: 0.2% chance of exploitation in the next 30 days.

A flaw was found in the Linux kernel's implementation of RDMA over infiniband. An attacker with a privileged local account can leak kernel stack information when issuing commands to the /dev/infiniband/rdma_cm device node. While this access is unlikely to leak sensitive user information, it can be further used to defeat existing kernel protection mechanisms.

Affected products

• Fedoraproject Fedora: version 37 only
• Linux Linux Kernel: before 5.15.14 (fixed in 5.15.14)
• Red Hat Enterprise Linux: version 6.0 only; version 7.0 only; version 8.0 only

Published 2023-03-27. Last modified 2026-06-17.