CVE-2023-53320: 
Linux Kernel vulnerability analysis and mitigation

CVE-2023-53320 affects the Linux kernel's SCSI subsystem, specifically in the mpi3mr driver. The vulnerability was discovered in September 2025 and involves multiple issues in the mpi3mr_get_all_tgt_info() function (Ubuntu Security).

The vulnerability exists in the mpi3mr_get_all_tgt_info() function and consists of four specific issues: 1) Incorrect calculation of valid entry length in alltgt_info assuming header part size as sizeof(u32) instead of sizeof(u64), 2) Incorrect calculation of valid entry length by excluding one entry, 3) Unnecessary use of memcpy() where substitution would suffice, and 4) Incorrect specification of payload length to sg_copy_from_buffer() causing a 'BUG: KASAN: slab-out-of-bounds' error (Ubuntu Security).

The vulnerability can lead to a kernel buffer overflow condition, potentially causing system crashes or memory corruption. The issue affects various Linux distributions including Ubuntu 22.04 LTS (jammy) and several kernel variants (Ubuntu Security).

The fix involves correcting the header size calculation, removing the subtraction from num_devices, replacing memcpy() with direct substitution, and specifying the correct length to sg_copy_from_buffer(). Various Linux distributions have released patches to address these issues (Ubuntu Security).