CVE-2025-40086

Kernel NULL dereference via same-VM buffer eviction

Published Oct 30, 2025 · Updated Oct 30, 2025

NULL pointer dereference in the Linux kernel 6.8 through 6.17.4 and 6.18-rc1 allows attackers to fault the drm/xe bind pipeline. An array of VM binds permits xe_bo_validate to evict another buffer object in the same VM, leaving a NULL reference for later bind processing. Reachability requires the drm/xe driver and the affected array-binding path; the disclosed consequence is the kernel pointer fault.

CVSS severityUnavailable
Unscored
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the Linux kernel 6.8 through 6.17.4 and 6.18-rc1 allows attackers to fault the drm/xe bind pipeline. An array of VM binds permits xe_bo_validate to evict another buffer object in the same VM, leaving a NULL reference for later bind processing. Reachability requires the drm/xe driver and the affected array-binding path; the disclosed consequence is the kernel pointer fault.

The record

CVE
CVE-2025-40086
Published
Oct 30, 2025
Updated
Oct 30, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 30, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.8
  2. Affected versionversion=dd08ebf6c3525a7ea2186e636df064ea47281987 <5aa0ab0ba7d94549cfe17d6ef7a4f33ba1de8384
  3. Affected versionversion=dd08ebf6c3525a7ea2186e636df064ea47281987 <7ac74613e5f2ef3450f44fd2127198662c2563a9

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=6.8; version=dd08ebf6c3525a7ea2186e636df064ea47281987 <5aa0ab0ba7d94549cfe17d6ef7a4f33ba1de8384; version=dd08ebf6c3525a7ea2186e636df064ea47281987 <7ac74613e5f2ef3450f44fd2127198662c2563a9

Published CVSS scores

No CVSS assessment is available in this record.

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)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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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