CVE-2020-0009Public exploit

Local privilege escalation via writable ashmem remapping

Published Jan 8, 2020 · Updated Aug 4, 2024

Privilege escalation in the Android kernel ashmem component allows local users to corrupt memory shared between processes. ashmem_mmap stores the backing shmem file in vm_file without preserving its protection checks, so remap_file_pages can restore VM_MAYWRITE. A local process holding an ashmem file descriptor can make a read-only mapping writable without added privileges or user interaction.

CVSS severity5.5
Medium
EPSS probability0.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Privilege escalation in the Android kernel ashmem component allows local users to corrupt memory shared between processes. ashmem_mmap stores the backing shmem file in vm_file without preserving its protection checks, so remap_file_pages can restore VM_MAYWRITE. A local process holding an ashmem file descriptor can make a read-only mapping writable without added privileges or user interaction.

The record

CVE
CVE-2020-0009
Published
Jan 8, 2020
Updated
Aug 4, 2024
Vendor
Google Cloud
Product
Android
Classifications
CWE-276, T1404
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Jan 8, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=Android kernel

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Google Cloud · Androidversion=Android kernel

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
2.1NIST NVDAV:L/AC:L/Au:N/C:N/I:P/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-276Incorrect Default Permissions
T1404Exploitation for Privilege Escalation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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