CVE-2018-9389

Local privilege escalation via IPv6 heap overflow

Published Jan 17, 2025 · Updated Feb 3, 2025

Heap buffer overflow in the Android kernel allows local users to escalate privileges by triggering IPv6 packet construction. The ip6_append_data function in ip6_output.c writes beyond a heap buffer while appending IPv6 packet data. Local access is sufficient; exploitation requires no additional execution privileges or user interaction and yields elevated code execution.

CVSS severity7.8
High
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overflow in the Android kernel allows local users to escalate privileges by triggering IPv6 packet construction. The ip6_append_data function in ip6_output.c writes beyond a heap buffer while appending IPv6 packet data. Local access is sufficient; exploitation requires no additional execution privileges or user interaction and yields elevated code execution.

The record

CVE
CVE-2018-9389
Published
Jan 17, 2025
Updated
Feb 3, 2025
Vendor
Google Cloud
Product
Android
Classifications
CWE-787, T1404
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Jan 17, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  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

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.1CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1404Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

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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