PT-2022-7341 · Google · Android Kernel

Published 2022-04-12 · Updated 2024-01-09 · CVE-2021-39802

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Android kernel versions (affected versions not specified)

Description The issue is related to a permissions bypass in the change pte range function of mprotect.c, which could allow making a shared mmap writable. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not required for exploitation.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Improper Privilege Management

Incorrect Authorization

Weakness Enumeration

CWE-269

CWE-863

Related Identifiers

BDU:2024-03755

CVE-2021-39802

Affected Products

Android Kernel

References · 16

• https://nvd.nist.gov/vuln/detail/CVE-2021-39802 · Security Note
• https://source.android.com/security/bulletin/2022-04-01 · Vendor Advisory
• https://bdu.fstec.ru/vul/2024-03755 · Security Note
• https://cve.org/CVERecord?id=CVE-2021-39802 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-39802 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-39802 · Vendor Advisory
• https://android.googlesource.com/kernel/common/+/ac4488815518c · Note
• https://lore.kernel.org/all/CAHk-=wj4KCujAH_oPh40Bkp48amM4MXr+8AcbZ=[e-mail]/#t · Note
• https://android.googlesource.com/kernel/common/+/b44e46bb047d1 · Note
• https://android.googlesource.com/kernel/common/+/67d075d23a8bc · Note
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39802 · Note
• https://source.android.com/docs/security/bulletin/2022-04-01?hl=ru · Note
• https://bugzilla.suse.com/show_bug.cgi?id=1198445 · Note
• https://android.googlesource.com/kernel/common/+/6f9aba5a20b84 · Note
• https://t.me/cvenotify/28769 · Telegram Post