CVE-2023-1192: Linux Kernel

Medium severity, CVSS 6.5. EPSS: 1.1% chance of exploitation in the next 30 days.

A use-after-free flaw was found in smb2_is_status_io_timeout() in CIFS in the Linux Kernel. After CIFS transfers response data to a system call, there are still local variable points to the memory region, and if the system call frees it faster than CIFS uses it, CIFS will access a free memory region, leading to a denial of service.

Affected products

• Linux Linux Kernel: before 6.4 (fixed in 6.4)
• Red Hat Enterprise Linux: version 8.0 only; version 9.0 only

Published 2023-11-01. Last modified 2026-06-17.