CVE-2024-35954: linux kernel Null Dereference — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: sg: Avoid sg device teardown race sg_remove_sfp_usercontext() must not use sg_device_destroy() after calling scsi_device_put(). sg_device_destroy() is accessing the parent scsi_device request_queue which will already be set to NULL when the preceding call to scsi_device_put() removed the last reference to the parent scsi_device. The resulting NULL pointer exception will then crash the kernel.

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CVSS v3.1 Score

4.7

MEDIUM

CVSS:3.1/AV:L/AC:H/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	6.4.7 — 6.6.28
linux	linux_kernel	6.7 — 6.8.7
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/27f58c04a8f438078583041468ec60597841284d https://git.kernel.org/stable/c/46af9047523e2517712ae8e71d984286c626e022 https://git.kernel.org/stable/c/b0d1ebcc1a9560e494ea9b3ee808540db26c5086 https://git.kernel.org/stable/c/27f58c04a8f438078583041468ec60597841284d https://git.kernel.org/stable/c/46af9047523e2517712ae8e71d984286c626e022 https://git.kernel.org/stable/c/b0d1ebcc1a9560e494ea9b3ee808540db26c5086

Frequently Asked Questions

What is CVE-2024-35954? +

In the Linux kernel, the following vulnerability has been resolved: scsi: sg: Avoid sg device teardown race sg_remove_sfp_usercontext() must not use sg_device_destroy() after calling scsi_device_put(). sg_device_destroy() is accessing the parent scsi_device request_queue which will already be set to NULL when the preceding call to scsi_device_put() removed the last reference to the parent scsi_device. The resulting NULL pointer exception will then crash the kernel. It has a CVSS v3.1 base score of 4.7 (MEDIUM).

How severe is CVE-2024-35954? +

CVE-2024-35954 has a CVSS v3.1 score of 4.7 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-2024-35954? +

CVE-2024-35954 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-2024-35954? +

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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