CVE-2023-52747: 
Linux Kernel vulnerability analysis and mitigation

CVE-2023-52747 is a vulnerability discovered in the Linux kernel, specifically affecting the IB/hfi1 (InfiniBand Host Fabric Interface) component. The vulnerability was disclosed on May 21, 2024, and involves a resource leak that occurs when there is a failure during the copyout operation (NVD).

The vulnerability is related to a resource management issue in the Linux kernel's IB/hfi1 driver. The bug specifically occurs in the user_exp_rcv_setup function within the file_ops.c file, where allocated resources were not properly restored when a copyout operation failed. This issue was introduced by commit f404ca4c7ea8 which refactored the hfi_user_exp_rcv_setup() IOCTL (Kernel Commit).

The vulnerability results in a resource leak in the Linux kernel when an error occurs during specific InfiniBand operations. This could potentially lead to system resource exhaustion over time (Debian Tracker).

The vulnerability has been fixed in various Linux kernel versions. Debian has released fixes in multiple versions: bullseye (5.10.234-1), bookworm (6.1.128-1), trixie (6.12.12-1), and sid (6.12.16-1). The fix involves properly restoring allocated resources when a copyout operation fails (Debian Tracker).