CVE-2023-40218

Service interruption via NPU driver integer overflow

Published Sep 12, 2023 · Updated Sep 26, 2024

Integer overflow in the NPU kernel driver for Samsung Exynos Mobile Processors allows local users to interrupt NPU service via a crafted application. The driver permits overflowed arithmetic to bypass its detection of error cases, but Samsung has not disclosed the affected operation or input field. Reaching the flaw requires high privileges and user interaction on a device using an Exynos 9820, 980, 2100, 2200, 1280, or 1380 processor; the reported consequence is limited to availability.

CVSS severity2.0
Low
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in the NPU kernel driver for Samsung Exynos Mobile Processors allows local users to interrupt NPU service via a crafted application. The driver permits overflowed arithmetic to bypass its detection of error cases, but Samsung has not disclosed the affected operation or input field. Reaching the flaw requires high privileges and user interaction on a device using an Exynos 9820, 980, 2100, 2200, 1280, or 1380 processor; the reported consequence is limited to availability.

The record

CVE
CVE-2023-40218
Published
Sep 12, 2023
Updated
Sep 26, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-190, T1499
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Sep 12, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 26, 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 privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

3.3NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
2.0MITRECVSS:3.1/AC:L/AV:L/A:L/C:N/I:N/PR:H/S:U/UI:R

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
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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