CVE-2022-40760

TEE kernel crash via unchecked chunk length

Published Sep 16, 2022 · Updated Aug 3, 2024

Incorrect buffer access in Samsung mTower 0.3.0 and earlier allows attackers to crash the TEE kernel through a trusted application. TEE_MACUpdate passes the application-supplied chunkSize to utee_hash_update without checking it against the chunk buffer, leading to an oversized memcpy. Control of a trusted application is required; the demonstrated consequence is a trusted execution environment kernel crash and service interruption.

CVSS severity7.5
High
EPSS probability1.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect buffer access in Samsung mTower 0.3.0 and earlier allows attackers to crash the TEE kernel through a trusted application. TEE_MACUpdate passes the application-supplied chunkSize to utee_hash_update without checking it against the chunk buffer, leading to an oversized memcpy. Control of a trusted application is required; the demonstrated consequence is a trusted execution environment kernel crash and service interruption.

The record

CVE
CVE-2022-40760
Published
Sep 16, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-119, T1499
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 16, 2022CVE 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1499Endpoint Denial of Service

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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