CVE-2023-53044: linux kernel Null Dereference — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: dm stats: check for and propagate alloc_percpu failure Check alloc_precpu()'s return value and return an error from dm_stats_init() if it fails. Update alloc_dev() to fail if dm_stats_init() does. Otherwise, a NULL pointer dereference will occur in dm_stats_cleanup() even if dm-stats isn't being actively used.

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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	3.12 — 4.14.312
linux	linux_kernel	4.15 — 4.19.280
linux	linux_kernel	4.20 — 5.4.240
linux	linux_kernel	5.5 — 5.10.177
linux	linux_kernel	5.11 — 5.15.105
linux	linux_kernel	5.16 — 6.1.22
linux	linux_kernel	6.2 — 6.2.9
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/0d96bd507ed7e7d565b6d53ebd3874686f123b2e https://git.kernel.org/stable/c/2287d7b721471a3d58bcd829250336e3cdf1635e https://git.kernel.org/stable/c/443c9d522397511a4328dc2ec3c9c63c73049756 https://git.kernel.org/stable/c/4a32a9a818a895671bd43e0c40351e60e4e9140b https://git.kernel.org/stable/c/5b66e36a3efd24041b7374432bfa4dec2ff01e95 https://git.kernel.org/stable/c/a42180dd361584816bfe15c137b665699b994d90 https://git.kernel.org/stable/c/c68f08cc745675a17894e1b4a5b5b9700ace6da4 https://git.kernel.org/stable/c/d3aa3e060c4a80827eb801fc448debc9daa7c46b

Frequently Asked Questions

What is CVE-2023-53044? +

In the Linux kernel, the following vulnerability has been resolved: dm stats: check for and propagate alloc_percpu failure Check alloc_precpu()'s return value and return an error from dm_stats_init() if it fails. Update alloc_dev() to fail if dm_stats_init() does. Otherwise, a NULL pointer dereference will occur in dm_stats_cleanup() even if dm-stats isn't being actively used. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2023-53044? +

CVE-2023-53044 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-2023-53044? +

CVE-2023-53044 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-2023-53044? +

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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