CVE-2021-47233

MEDIUMNVD 5.55.5—

5.5

In the Linux kernel, the following vulnerability has been resolved:

regulator: rt4801: Fix NULL pointer dereference if priv->enable_gpios is NULL

devm_gpiod_get_array_optional may return NULL if no GPIO was assigned.

CVSS v3: 5.5
EG Score: 5.5(medium)
EPSS: 16.9%
KEV: Not listed

Published

May 21, 2024

Last Modified

December 30, 2024

References (6)

416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ba8a26a7ce8617f9f3d6230de34b2302df086b41
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cb2381cbecb81a8893b2d1e1af29bc2e5531df27
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dc68f0c9e4a001e02376fe87f4bdcacadb27e8a1
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/ba8a26a7ce8617f9f3d6230de34b2302df086b41
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/cb2381cbecb81a8893b2d1e1af29bc2e5531df27
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/dc68f0c9e4a001e02376fe87f4bdcacadb27e8a1

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-476NULL Pointer Dereference

Data Freshness Timeline

(refreshed 11× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-05 06:09 UTCepss_batch
2026-06-05 06:09 UTCepss_batch
2026-06-04 13:11 UTCepss_batch
2026-06-04 13:10 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
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2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
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2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
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2026-05-27 13:39 UTCepss_batch
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2026-05-26 13:43 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2021-47233?

CVE-2021-47233 is a medium vulnerability published on May 21, 2024. In the Linux kernel, the following vulnerability has been resolved: regulator: rt4801: Fix NULL pointer dereference if priv->enable_gpios is NULL devmgpiodgetarrayoptional may return NULL if no GPIO was assigned.

When was CVE-2021-47233 disclosed?

CVE-2021-47233 was first published in the National Vulnerability Database on May 21, 2024, with the most recent update on December 30, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-47233 actively exploited?

CVE-2021-47233 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 16.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-47233?

CVE-2021-47233 has a CVSS v3 base score of 5.5 (NVD).

How do I remediate CVE-2021-47233?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-47233, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-2021-47233

📅 Published

🔄 Last Modified

🔗 References (6)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-47233?

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References (6)

Frequently asked(5)

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