Use After Free in Google Android
CVE-2021-39800
In ion_ioctl of ion-ioctl.c, there is a possible way to leak kernel head data due to a use after free. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-208277166References: Upstream kernel
Vulnerability class: Use-After-Free
EPSS: 0.001 (3.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Google Android
- N/a Android — versions Android kernel
Weakness classification (CWE)
References
- security@android.com (Patch, x_refsource_MISC, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-39800?
- CVE-2021-39800 is a medium-severity vulnerability in Google Android, classified under Use After Free. CVSS score: 5.5/10. Published 2022-04-12.
- How severe is CVE-2021-39800?
- Medium severity. CVSS v3 base score is 5.5 out of 10.