CVE-2025-38102

Local privilege escalation via VMCI notify-page race

Published Jul 3, 2025 · Updated Aug 5, 2026

A race condition in the Linux kernel VMCI host driver allows local users to gain kernel privileges through concurrent SET_NOTIFY ioctls. vmci_host_setup_notify publishes context->notify_page before get_user_pages_fast finishes, letting vmci_ctx_unset_notify release the page concurrently. A normal local account with access to /dev/vmci can repeat the race to read or write kernel memory, escalate privileges, or crash the host.

CVSS severity7.8
High
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A race condition in the Linux kernel VMCI host driver allows local users to gain kernel privileges through concurrent SET_NOTIFY ioctls. vmci_host_setup_notify publishes context->notify_page before get_user_pages_fast finishes, letting vmci_ctx_unset_notify release the page concurrently. A normal local account with access to /dev/vmci can repeat the race to read or write kernel memory, escalate privileges, or crash the host.

The record

CVE
CVE-2025-38102
Published
Jul 3, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 3, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record 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=4.0
  2. Affected versionversion=a1d88436d53a75e950db15834b3d2f8c0c358fdc <00ddc7dad55b7bbb78df80d6e174d0c4764dea0c
  3. Affected versionversion=a1d88436d53a75e950db15834b3d2f8c0c358fdc <1bd6406fb5f36c2bb1e96e27d4c3e9f4d09edde4
  4. Affected versionversion=a1d88436d53a75e950db15834b3d2f8c0c358fdc <468aec888f838ce5174b96e0cb4396790d6f60ca
  5. Affected versionversion=a1d88436d53a75e950db15834b3d2f8c0c358fdc <58a90db70aa6616411e5f69d1982d9b1dd97d774
  6. Affected versionversion=a1d88436d53a75e950db15834b3d2f8c0c358fdc <6e3af836805ed1d7a699f76ec798626198917aa4
  7. Affected versionversion=a1d88436d53a75e950db15834b3d2f8c0c358fdc <74095bbbb19ca74a0368d857603a2438c88ca86c
  8. Affected versionversion=a1d88436d53a75e950db15834b3d2f8c0c358fdc <75b5313c80c39a26d27cbb602f968a05576c36f9
  9. Affected versionversion=a1d88436d53a75e950db15834b3d2f8c0c358fdc <b4209e4b778e4e57d0636e1c9fc07a924dbc6043

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.0; version=a1d88436d53a75e950db15834b3d2f8c0c358fdc <00ddc7dad55b7bbb78df80d6e174d0c4764dea0c; version=a1d88436d53a75e950db15834b3d2f8c0c358fdc <1bd6406fb5f36c2bb1e96e27d4c3e9f4d09edde4; version=a1d88436d53a75e950db15834b3d2f8c0c358fdc <468aec888f838ce5174b96e0cb4396790d6f60ca; version=a1d88436d53a75e950db15834b3d2f8c0c358fdc <58a90db70aa6616411e5f69d1982d9b1dd97d774; version=a1d88436d53a75e950db15834b3d2f8c0c358fdc <6e3af836805ed1d7a699f76ec798626198917aa4; version=a1d88436d53a75e950db15834b3d2f8c0c358fdc <74095bbbb19ca74a0368d857603a2438c88ca86c; version=a1d88436d53a75e950db15834b3d2f8c0c358fdc <75b5313c80c39a26d27cbb602f968a05576c36f9; version=a1d88436d53a75e950db15834b3d2f8c0c358fdc <b4209e4b778e4e57d0636e1c9fc07a924dbc6043

Published CVSS scores

7.8LinuxCVSS:3.1/AV:L/AC:L/PR:L/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.

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

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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