CVE-2025-39741

Graphics service interruption via oversized migration copy

Published Sep 11, 2025 · Updated May 11, 2026

Size-calculation error in Linux 6.16 through 6.16.1 allows local users to interrupt graphics service through the drm/xe migration copier. emit_copy aligns the pitch to four bytes but limits the current byte count without accounting for that pitch, allowing the copy height to exceed S16_MAX and trigger an assertion. Reachability requires the Xe graphics migration path and a near-8 MiB non-page-aligned copy; the documented consequence is an assertion and availability loss, not data disclosure or modification.

CVSS severity5.5
Medium
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

Size-calculation error in Linux 6.16 through 6.16.1 allows local users to interrupt graphics service through the drm/xe migration copier. emit_copy aligns the pitch to four bytes but limits the current byte count without accounting for that pitch, allowing the copy height to exceed S16_MAX and trigger an assertion. Reachability requires the Xe graphics migration path and a near-8 MiB non-page-aligned copy; the documented consequence is an assertion and availability loss, not data disclosure or modification.

The record

CVE
CVE-2025-39741
Published
Sep 11, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 11, 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=270172f64b114451876c1b68912653e72ab99f38 <4126cb327a2e3273c81fcef1c594c5b7b645c44c
  2. Affected versionversion=270172f64b114451876c1b68912653e72ab99f38 <7257cc6644d540130a46a61531a07a0517cace89
  3. Affected versionversion=6.16

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=270172f64b114451876c1b68912653e72ab99f38 <4126cb327a2e3273c81fcef1c594c5b7b645c44c; version=270172f64b114451876c1b68912653e72ab99f38 <7257cc6644d540130a46a61531a07a0517cace89; version=6.16

Published CVSS scores

5.5NVDCVSS: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

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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