CVE-2023-54234
Unknown Unknown - Not Provided

Use-After-Free in Linux Kernel SCSI mpi3mr Due to Uninitialized Array

Publication date: 2025-12-30

Last updated on: 2025-12-30

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: scsi: mpi3mr: Fix missing mrioc->evtack_cmds initialization Commit c1af985d27da ("scsi: mpi3mr: Add Event acknowledgment logic") introduced an array mrioc->evtack_cmds but initialization of the array elements was missed. They are just zero cleared. The function mpi3mr_complete_evt_ack() refers host_tag field of the elements. Due to the zero value of the host_tag field, the function calls clear_bit() for mrico->evtack_cmds_bitmap with wrong bit index. This results in memory access to invalid address and "BUG: KASAN: use-after-free". This BUG was observed at eHBA-9600 firmware update to version 8.3.1.0. To fix it, add the missing initialization of mrioc->evtack_cmds.

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Meta Information

Published
2025-12-30
Last Modified
2025-12-30
Generated
2026-07-06
AI Q&A
2025-12-30
EPSS Evaluated
2026-07-05
NVD
CVE-2023-54234
EUVD
EUVD-2023-60407

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
linux kernel *
linux linux_kernel *

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability in the Linux kernel's scsi mpi3mr driver is due to missing initialization of an array called mrioc->evtack_cmds. Because the elements of this array were not properly initialized, a function called mpi3mr_complete_evt_ack() uses an invalid index when calling clear_bit(), leading to memory access at an invalid address and causing a use-after-free bug detected by KASAN.

Impact Analysis

The vulnerability can cause the Linux kernel to access invalid memory, resulting in a use-after-free bug. This can lead to system instability, crashes, or potential security risks related to memory corruption.

Mitigation Strategies

To mitigate this vulnerability, update the Linux kernel to a version that includes the fix for the missing initialization of mrioc->evtack_cmds, as described in commit c1af985d27da. This fix prevents the use-after-free bug caused by invalid memory access. Applying the latest kernel patches or firmware updates that address this issue is recommended.

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