CVE-2021-38787

HIGHNVD 7.57.5—

7.5

There is an integer overflow in the ION driver "/dev/ion" of Allwinner R818 SoC Android Q SDK V1.0 that could use the ioctl cmd "COMPAT_ION_IOC_SUNXI_FLUSH_RANGE" to cause a system crash (denial of service).

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 74.2%
KEV: Not listed

Published

January 19, 2022

Last Modified

November 21, 2024

References (8)

cve@mitrehttps://github.com/pokerfacett/MY_CVE_CREDIT/blob/master/Allwinner%20R818%20SoC%EF%BC%9AION%20Driver%20Integer%20Overflow.md
cve@mitrehttps://vul.wangan.com/a/CNVD-2021-49171
cve@mitrehttps://www.allwinnertech.com/index.php?c=product&a=index&id=92
cve@mitrehttps://www.cnvd.org.cn/flaw/show/CNVD-2021-49171
af854a3a-2127-422b-91ae-364da2661108https://github.com/pokerfacett/MY_CVE_CREDIT/blob/master/Allwinner%20R818%20SoC%EF%BC%9AION%20Driver%20Integer%20Overflow.md
af854a3a-2127-422b-91ae-364da2661108https://vul.wangan.com/a/CNVD-2021-49171
af854a3a-2127-422b-91ae-364da2661108https://www.allwinnertech.com/index.php?c=product&a=index&id=92
af854a3a-2127-422b-91ae-364da2661108https://www.cnvd.org.cn/flaw/show/CNVD-2021-49171

Weakness Classification(1)

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

CWE-190Integer Overflow or Wraparound

Data Freshness Timeline

(refreshed 12× 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 13:10 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
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:42 UTCepss_batch

Frequently asked(5)

What is CVE-2021-38787?

CVE-2021-38787 is a high vulnerability published on January 19, 2022. There is an integer overflow in the ION driver "/dev/ion" of Allwinner R818 SoC Android Q SDK V1.0 that could use the ioctl cmd "COMPATIONIOCSUNXIFLUSH_RANGE" to cause a system crash (denial of service).

When was CVE-2021-38787 disclosed?

CVE-2021-38787 was first published in the National Vulnerability Database on January 19, 2022, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-38787 actively exploited?

CVE-2021-38787 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 74.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-38787?

CVE-2021-38787 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2021-38787?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-38787, 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.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-38787

Explore →

Is Your Infrastructure Affected by CVE-2021-38787?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs

CVE-2021-38787

📅 Published

🔄 Last Modified

🔗 References (8)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-38787?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (8)

Frequently asked(5)

Related CVEs(same CWE)