🛡️ CVE-2021-39802

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Affected software

CVE-2021-39802 is recorded against 1 package.

  • :linux-kernel: (from :0 up to :2022-04-05)

Timeline and source

Published on 1 April 2022 and last revised on 11 August 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from OSV.

References

source.android.com (Advisory)
android.googlesource.com (Fix)
android.googlesource.com (Fix)
android.googlesource.com (Fix)
android.googlesource.com (Fix)

CVE-2021-39802 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2022-04-01
Updated 2026-08-11
Modified 2026-08-11

Affected Packages

Software From version Fixed in
:linux-kernel: :0 :2022-04-05

Similar Threats

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