CVE-2023-4133: Fedoraproject Fedora

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

A use-after-free vulnerability was found in the cxgb4 driver in the Linux kernel. The bug occurs when the cxgb4 device is detaching due to a possible rearming of the flower_stats_timer from the work queue. This flaw allows a local user to crash the system, causing a denial of service condition.

Affected products

• Fedoraproject Fedora: affected versions not specified
• Linux Linux Kernel: before 6.3 (fixed in 6.3)
• Red Hat Enterprise Linux: version 8.0 only; version 9.0 only

Published 2023-08-03. Last modified 2026-06-17.