CVE-2025-39700

Kernel crash via invalid DAMON migration target

Published Sep 5, 2025 · Updated May 11, 2026

Improper input validation in Linux kernel 6.11 allows local users to crash the kernel through an invalid DAMON migration request. The damon_migrate_pages() path passes an unchecked target node from DAMOS_MIGRATE_HOT or DAMOS_MIGRATE_COLD into page migration, causing a page fault on a nonexistent node. Reachability requires local low-privileged access and submission of an invalid target node; the reported consequence is an availability-only kernel Oops.

CVSS severity5.5
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Linux kernel 6.11 allows local users to crash the kernel through an invalid DAMON migration request. The damon_migrate_pages() path passes an unchecked target node from DAMOS_MIGRATE_HOT or DAMOS_MIGRATE_COLD into page migration, causing a page fault on a nonexistent node. Reachability requires local low-privileged access and submission of an invalid target node; the reported consequence is an availability-only kernel Oops.

The record

CVE
CVE-2025-39700
Published
Sep 5, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-1284, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 5, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=6.11
  2. Affected versionversion=b51820ebea656be3b48bb16dcdc5ad3f203c4fd7 <7c303fa1f311aadc17fa82b7bbf776412adf45de
  3. Affected versionversion=b51820ebea656be3b48bb16dcdc5ad3f203c4fd7 <7e6c3130690a01076efdf45aa02ba5d5c16849a0
  4. Affected versionversion=b51820ebea656be3b48bb16dcdc5ad3f203c4fd7 <9d0c2d15aff96746f99a7c97221bb8ce5b62db19

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.11; version=b51820ebea656be3b48bb16dcdc5ad3f203c4fd7 <7c303fa1f311aadc17fa82b7bbf776412adf45de; version=b51820ebea656be3b48bb16dcdc5ad3f203c4fd7 <7e6c3130690a01076efdf45aa02ba5d5c16849a0; version=b51820ebea656be3b48bb16dcdc5ad3f203c4fd7 <9d0c2d15aff96746f99a7c97221bb8ce5b62db19

Published CVSS scores

5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1284Improper Validation of Specified Quantity in Input
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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