CVE-2024-36920: linux kernel — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: mpi3mr: Avoid memcpy field-spanning write WARNING When the "storcli2 show" command is executed for eHBA-9600, mpi3mr driver prints this WARNING message: memcpy: detected field-spanning write (size 128) of single field "bsg_reply_buf->reply_buf" at drivers/scsi/mpi3mr/mpi3mr_app.c:1658 (size 1) WARNING: CPU: 0 PID: 12760 at drivers/scsi/mpi3mr/mpi3mr_app.c:1658 mpi3mr_bsg_request+0x6b12/0x7f10 [mpi3mr] The cause of the WARN is 128 bytes memcpy to the 1 byte size array "__u8 replay_buf[1]" in the struct mpi3mr_bsg_in_reply_buf. The array is intended to be a flexible length array, so the WARN is a false positive. To suppress the WARN, remove the constant number '1' from the array declaration and clarify that it has flexible length. Also, adjust the memory allocation size to match the change.

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CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Products

Vendor	Product	Versions
linux	linux_kernel	5.14 — 6.1.91
linux	linux_kernel	6.2 — 6.6.31
linux	linux_kernel	6.7 — 6.8.10
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/429846b4b6ce9853e0d803a2357bb2e55083adf0 https://git.kernel.org/stable/c/4d2772324f43cf5674ac3dbe3f74a7e656396716 https://git.kernel.org/stable/c/5f0266044dc611563539705bff0b3e1545fbb6aa https://git.kernel.org/stable/c/f09318244c6cafd10aca741b9c01e0a2c362d43a https://git.kernel.org/stable/c/429846b4b6ce9853e0d803a2357bb2e55083adf0 https://git.kernel.org/stable/c/4d2772324f43cf5674ac3dbe3f74a7e656396716 https://git.kernel.org/stable/c/5f0266044dc611563539705bff0b3e1545fbb6aa https://git.kernel.org/stable/c/f09318244c6cafd10aca741b9c01e0a2c362d43a

Frequently Asked Questions

What is CVE-2024-36920? +

In the Linux kernel, the following vulnerability has been resolved: scsi: mpi3mr: Avoid memcpy field-spanning write WARNING When the "storcli2 show" command is executed for eHBA-9600, mpi3mr driver prints this WARNING message: memcpy: detected field-spanning write (size 128) of single field "bsg_reply_buf->reply_buf" at drivers/scsi/mpi3mr/mpi3mr_app.c:1658 (size 1) WARNING: CPU: 0 PID: 12760 at drivers/scsi/mpi3mr/mpi3mr_app.c:1658 mpi3mr_bsg_request+0x6b12/0x7f10 [mpi3mr] The cause of the WARN is 128 bytes memcpy to the 1 byte size array "__u8 replay_buf[1]" in the struct mpi3mr_bsg_in_reply_buf. The array is intended to be a flexible length array, so the WARN is a false positive. To suppress the WARN, remove the constant number '1' from the array declaration and clarify that it has flexible length. Also, adjust the memory allocation size to match the change. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-36920? +

CVE-2024-36920 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-36920? +

CVE-2024-36920 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-36920? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2024-36920