{"cve":"CVE-2021-38787","nvd":{"published":"2022-01-19T13:15:07.870","modified":"2026-06-17T04:02:43.870","status":"Modified","description":"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_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-190"],"references":["https://github.com/pokerfacett/MY_CVE_CREDIT/blob/master/Allwinner%20R818%20SoC%EF%BC%9AION%20Driver%20Integer%20Overflow.md","https://vul.wangan.com/a/CNVD-2021-49171","https://www.allwinnertech.com/index.php?c=product&a=index&id=92","https://www.cnvd.org.cn/flaw/show/CNVD-2021-49171","https://github.com/pokerfacett/MY_CVE_CREDIT/blob/master/Allwinner%20R818%20SoC%EF%BC%9AION%20Driver%20Integer%20Overflow.md"],"products":["allwinnertech:android_q_sdk"],"source":"nvd","synced_at":"2026-10-19T21:27:20.926095847+00:00"},"epss":{"cve":"CVE-2021-38787","score":0.01947,"percentile":0.802,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}