CVE-2023-53320 in Linux
Tóm tắt
Bởi MITRE • 16/09/2025
In the Linux kernel, the following vulnerability has been resolved:
scsi: mpi3mr: Fix issues in mpi3mr_get_all_tgt_info()
The function mpi3mr_get_all_tgt_info() has four issues:
1) It calculates valid entry length in alltgt_info assuming the header part of the struct mpi3mr_device_map_info would equal to sizeof(u32). The correct size is sizeof(u64).
2) When it calculates the valid entry length kern_entrylen, it excludes one entry by subtracting 1 from num_devices.
3) It copies num_device by calling memcpy(). Substitution is enough.
4) It does not specify the calculated length to sg_copy_from_buffer(). Instead, it specifies the payload length which is larger than the alltgt_info size. It causes "BUG: KASAN: slab-out-of-bounds".
Fix the issues by using the correct header size, removing the subtraction from num_devices, replacing the memcpy() with substitution and specifying the correct length to sg_copy_from_buffer().
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