CVE-2024-20118

Local privilege escalation via incorrect mms bounds check

Published Nov 4, 2024 · Updated Nov 4, 2024

Out-of-bounds write in MediaTek mms on Android 12.0 through 15.0 allows local users with System privileges to escalate privileges. The mms component applies an incorrect bounds check, creating a write-what-where condition that writes beyond the intended memory boundary. Exploitation requires existing System execution privileges, needs no user interaction, and can raise local privileges on affected chipsets.

CVSS severity6.7
Medium
EPSS probability0.08%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in MediaTek mms on Android 12.0 through 15.0 allows local users with System privileges to escalate privileges. The mms component applies an incorrect bounds check, creating a write-what-where condition that writes beyond the intended memory boundary. Exploitation requires existing System execution privileges, needs no user interaction, and can raise local privileges on affected chipsets.

The record

CVE
CVE-2024-20118
Published
Nov 4, 2024
Updated
Nov 4, 2024
Vendor
MediaTek
Product
MT6889
Classifications
CWE-123, CWE-787, T1068
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Nov 4, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 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?

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

  1. Affected versionversion=0 <=*

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

MediaTek · MT6889version=0 <=*
MediaTek · MT8792version=0 <=*
MediaTek · MT6789version=0 <=*
MediaTek · MT6835version=0 <=*
MediaTek · MT6768version=0 <=*
MediaTek · MediaTek MT6785version=0 <=*
MediaTek · MT6855version=0 <=*
MediaTek · MediaTek MT6765version=0 <=*
MediaTek · MT6893version=0 <=*
MediaTek · MT6885version=0 <=*
MediaTek · MT6873version=0 <=*
MediaTek · MT6781version=0 <=*
MediaTek · MT6739version=0 <=*
MediaTek · MT6877version=0 <=*
MediaTek · MediaTek MT6761version=0 <=*
Google · Androidversion=12.0; version=13.0; version=14.0; version=15.0
MediaTek · MT6853version=0 <=*
MediaTek · MT8676version=0 <=*
MediaTek · MT6883version=0 <=*
MediaTek · MT6833version=0 <=*
MediaTek · MediaTek MT6779version=0 <=*

Published CVSS scores

6.7MediaTekCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-123Write-what-where Condition
CWE-787Out-of-bounds Write
T1068Exploitation 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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