CVE-2025-23107

Local privilege escalation via unchecked NPU buffer lengths

Published Jun 3, 2025 · Updated Jun 3, 2025

Out-of-bounds write in the NPU driver in Samsung Exynos 1480 and 2400 allows local users to escalate privileges via a crafted buffer. The fill_vs4l_buffer function copies reserved fields using kernel queue counts without verifying that the user-provided container and buffer arrays are equally large. An application in the untrusted_app SELinux context can supply undersized arrays, causing attacker-controlled writes beyond their bounds in kernel memory.

CVSS severity8.6
High
EPSS probability0.34%
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 the NPU driver in Samsung Exynos 1480 and 2400 allows local users to escalate privileges via a crafted buffer. The fill_vs4l_buffer function copies reserved fields using kernel queue counts without verifying that the user-provided container and buffer arrays are equally large. An application in the untrusted_app SELinux context can supply undersized arrays, causing attacker-controlled writes beyond their bounds in kernel memory.

The record

CVE
CVE-2025-23107
Published
Jun 3, 2025
Updated
Jun 3, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1404
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 3, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8STAR LabsCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.6CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L

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
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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