CVE-2023-53124: linux kernel Null Dereference — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: mpt3sas: Fix NULL pointer access in mpt3sas_transport_port_add() Port is allocated by sas_port_alloc_num() and rphy is allocated by either sas_end_device_alloc() or sas_expander_alloc(), all of which may return NULL. So we need to check the rphy to avoid possible NULL pointer access. If sas_rphy_add() returned with failure, rphy is set to NULL. We would access the rphy in the following lines which would also result NULL pointer access.

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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

Weakness Type (CWE)

CWE-476 CWE-476

Affected Products

Vendor	Product	Versions
linux	linux_kernel	5.4.229 — 5.4.238
linux	linux_kernel	5.10.163 — 5.10.176
linux	linux_kernel	5.15.86 — 5.15.104
linux	linux_kernel	6.0.16 — 6.1
linux	linux_kernel	6.1.2 — 6.1.21
linux	linux_kernel	6.2 — 6.2.8
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/090305c36185c0547e4441d4c08f1cf096b32134 https://git.kernel.org/stable/c/6f0c2f70d9929208d8427ec72c3ed91e2251e289 https://git.kernel.org/stable/c/9937f784a608944107dcc2ba9a9c3333f8330b9e https://git.kernel.org/stable/c/a26c775ccc4cfe46f9b718b51bd24313053c7e0b https://git.kernel.org/stable/c/b5e5bbb3fa5f8412e96c5eda7f4a4af6241d6bd3 https://git.kernel.org/stable/c/d3c57724f1569311e4b81e98fad0931028b9bdcd

Frequently Asked Questions

What is CVE-2023-53124? +

In the Linux kernel, the following vulnerability has been resolved: scsi: mpt3sas: Fix NULL pointer access in mpt3sas_transport_port_add() Port is allocated by sas_port_alloc_num() and rphy is allocated by either sas_end_device_alloc() or sas_expander_alloc(), all of which may return NULL. So we need to check the rphy to avoid possible NULL pointer access. If sas_rphy_add() returned with failure, rphy is set to NULL. We would access the rphy in the following lines which would also result NULL pointer access. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2023-53124? +

CVE-2023-53124 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-2023-53124? +

CVE-2023-53124 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-2023-53124? +

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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