High severity7.8NVD Advisory· Published Apr 12, 2022· Updated Jun 17, 2026
CVE-2021-39802
CVE-2021-39802
Description
In change_pte_range of mprotect.c , there is a possible way to make a shared mmap writable due to a permissions bypass. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-213339151References: Upstream kernel
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Affected products
3- Android/Android kerneldescription
Patches
Vulnerability mechanics
References
1- source.android.com/security/bulletin/2022-04-01nvdPatchVendor Advisory
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