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

Status: published. Published: 2025-05-01. Updated: 2026-11-05.

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linux / Linux: ≥ 57291ce295c0aca738dd284c4a9c591c09ebee71; < aaf552c5d53abe4659176e099575fe870d2e4768 (affected, git); ≥ 57291ce295c0aca738dd284c4a9c591c09ebee71; < b4d9f55cd38435358bc16d580612bc0d798d7b4c (affected, git); ≥ 57291ce295c0aca738dd284c4a9c591c09ebee71; < a988dcd3dd9e691c5ccc3324b209688f3b5453e9 (affected, git); ≥ 57291ce295c0aca738dd284c4a9c591c09ebee71; < 040f726fecd88121f3b95e70369785ad452dddf9 (affected, git); ≥ 57291ce295c0aca738dd284c4a9c591c09ebee71; < 777430aa4ddccaa5accec6db90ffc1d47f00d471 (affected, git); ≥ 57291ce295c0aca738dd284c4a9c591c09ebee71; < 97e5b508e96176f1a73888ed89df396d7041bfcb (affected, git); ≥ 57291ce295c0aca738dd284c4a9c591c09ebee71; < 5834a3a98cd266ad35a229923c0adbd0addc8d68 (affected, git); ≥ 57291ce295c0aca738dd284c4a9c591c09ebee71; < 91d5c5060ee24fe8da88cd585bb43b843d2f0dce (affected, git). Source: CNA: Linux
- Linux / Linux: 3.5 (affected); ≥ 0; < 3.5 (unaffected, semver); ≥ 4.9.334; ≤ 4.9.* (unaffected, semver); ≥ 4.14.300; ≤ 4.14.* (unaffected, semver); ≥ 4.19.267; ≤ 4.19.* (unaffected, semver); ≥ 5.4.225; ≤ 5.4.* (unaffected, semver); ≥ 5.10.156; ≤ 5.10.* (unaffected, semver); ≥ 5.15.80; ≤ 5.15.* (unaffected, semver); ≥ 6.0.10; ≤ 6.0.* (unaffected, semver); ≥ 6.1; ≤ * (unaffected, original_commit_for_fix). Source: CNA: Linux

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: 0.22% as of 2026-11-05; percentile 12.34%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: Not reported

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://git.kernel.org/stable/c/aaf552c5d53abe4659176e099575fe870d2e4768 (CNA: Linux)

- https://git.kernel.org/stable/c/b4d9f55cd38435358bc16d580612bc0d798d7b4c (CNA: Linux)

- https://git.kernel.org/stable/c/a988dcd3dd9e691c5ccc3324b209688f3b5453e9 (CNA: Linux)

- https://git.kernel.org/stable/c/040f726fecd88121f3b95e70369785ad452dddf9 (CNA: Linux)

- https://git.kernel.org/stable/c/777430aa4ddccaa5accec6db90ffc1d47f00d471 (CNA: Linux)

- https://git.kernel.org/stable/c/97e5b508e96176f1a73888ed89df396d7041bfcb (CNA: Linux)

- https://git.kernel.org/stable/c/5834a3a98cd266ad35a229923c0adbd0addc8d68 (CNA: Linux)

- https://git.kernel.org/stable/c/91d5c5060ee24fe8da88cd585bb43b843d2f0dce (CNA: Linux)

## Provenance

- CNA: Linux: https://www.cve.org/CVERecord?id=CVE-2022-49832; retrieved 2026-11-05; source updated 2026-11-05

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2022-49832; retrieved 2026-11-05; source updated Not reported

Revision: aa208bd0780cf184bce604defd0f985b0ebd4667166ca6dd92b45e9429e99804

Canonical: https://y2.dev/cve/CVE-2022-49832

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