Integer overflow in Allwinnertech Android Q Sdk
CVE-2021-38787
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).
Vulnerability class: Integer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.019 (79.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 79.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · change: 0.000
Affected products
- Allwinnertech Android Q Sdk — versions 1.0
- Allwinnertech R818
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.allwinnertech.com/index.php (Product, Vendor Advisory)
- github.com/pokerfacett/MY_CVE_CREDIT/blob/master/Allwinner R818 SoC：ION Driver… (Third Party Advisory, Broken Link)
- www.cnvd.org.cn/flaw/show/CNVD-2021-49171 (Third Party Advisory)
- vul.wangan.com/a/CNVD-2021-49171 (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-38787?
- CVE-2021-38787 is a high-severity vulnerability in Allwinnertech Android Q Sdk, classified under Integer Overflow or Wraparound. CVSS score: 7.5/10. Published 2022-01-19.
- How severe is CVE-2021-38787?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-38787 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.