CVE-2022-49832: linux kernel Null Dereference — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: pinctrl: devicetree: fix null pointer dereferencing in pinctrl_dt_to_map Here is the BUG report by KASAN about null pointer dereference: BUG: KASAN: null-ptr-deref in strcmp+0x2e/0x50 Read of size 1 at addr 0000000000000000 by task python3/2640 Call Trace: strcmp __of_find_property of_find_property pinctrl_dt_to_map kasprintf() would return NULL pointer when kmalloc() fail to allocate. So directly return ENOMEM, if kasprintf() return NULL pointer.

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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	3.5 — 4.9.334
linux	linux_kernel	4.10 — 4.14.300
linux	linux_kernel	4.15 — 4.19.267
linux	linux_kernel	4.20 — 5.4.225
linux	linux_kernel	5.5 — 5.10.156
linux	linux_kernel	5.11 — 5.15.80
linux	linux_kernel	5.16 — 6.0.10
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/040f726fecd88121f3b95e70369785ad452dddf9 https://git.kernel.org/stable/c/5834a3a98cd266ad35a229923c0adbd0addc8d68 https://git.kernel.org/stable/c/777430aa4ddccaa5accec6db90ffc1d47f00d471 https://git.kernel.org/stable/c/91d5c5060ee24fe8da88cd585bb43b843d2f0dce https://git.kernel.org/stable/c/97e5b508e96176f1a73888ed89df396d7041bfcb https://git.kernel.org/stable/c/a988dcd3dd9e691c5ccc3324b209688f3b5453e9 https://git.kernel.org/stable/c/aaf552c5d53abe4659176e099575fe870d2e4768 https://git.kernel.org/stable/c/b4d9f55cd38435358bc16d580612bc0d798d7b4c

Frequently Asked Questions

What is CVE-2022-49832? +

In the Linux kernel, the following vulnerability has been resolved: pinctrl: devicetree: fix null pointer dereferencing in pinctrl_dt_to_map Here is the BUG report by KASAN about null pointer dereference: BUG: KASAN: null-ptr-deref in strcmp+0x2e/0x50 Read of size 1 at addr 0000000000000000 by task python3/2640 Call Trace: strcmp __of_find_property of_find_property pinctrl_dt_to_map kasprintf() would return NULL pointer when kmalloc() fail to allocate. So directly return ENOMEM, if kasprintf() return NULL pointer. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2022-49832? +

CVE-2022-49832 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-2022-49832? +

CVE-2022-49832 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-2022-49832? +

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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