What’s Vulnerable › Vulnerabilities

CVE-2022-49832: pinctrl: devicetree: fix null pointer dereferencing in pinctrl_dt_to_map

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-05-01 · updated 2026-06-17
• Weakness: CWE-476

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.

Affected products

• Linux kernel: from 3.5 before 4.9.334; from 4.10 before 4.14.300; from 4.15 before 4.19.267; from 4.20 before 5.4.225; from 5.5 before 5.10.156; from 5.11 before 5.15.80 — fixed in 4.14.300, 4.19.267, 4.9.334, 5.10.156, 5.15.80, 5.4.225

How to fix

Upgrade to a fixed version: Linux kernel 4.14.300, 4.19.267, 4.9.334, 5.10.156. Check the vendor advisory for mitigations.

References

• 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

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