CVE-2021-1044

Local privilege escalation via missing AES-GCM bounds check

Published Dec 15, 2021 · Updated Aug 3, 2024

Out-of-bounds write in Google Titan M Android kernel firmware allows local users to escalate privileges through AES-GCM decryption. The eicOpsDecryptAes128Gcm routine in acropora/app/identity/identity_support.c writes beyond a buffer because it omits a bounds check on decryption data. A local low-privileged process can trigger the corruption without user interaction, and successful exploitation grants higher privileges on the device.

CVSS severity7.8
High
EPSS probability0.13%
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 Google Titan M Android kernel firmware allows local users to escalate privileges through AES-GCM decryption. The eicOpsDecryptAes128Gcm routine in acropora/app/identity/identity_support.c writes beyond a buffer because it omits a bounds check on decryption data. A local low-privileged process can trigger the corruption without user interaction, and successful exploitation grants higher privileges on the device.

The record

CVE
CVE-2021-1044
Published
Dec 15, 2021
Updated
Aug 3, 2024
Vendor
Google
Product
Titan M
Classifications
CWE-787, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 15, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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 privilegesauthenticated

What is affected?

Google · Titan Mversion=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
7.2NIST NVDAV:L/AC:L/Au:N/C:C/I:C/A:C

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

Weakness, pattern, technique

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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