CVE-2025-71298

Local kernel warning via unlocked shmem madvise

Published May 8, 2026 · Updated May 8, 2026

Improper locking in Linux Kernel 6.16 through 6.18.15 and 6.19 through 6.19.5 allows local users to trigger a DRM shmem warning. The KUnit shmem tests call drm_gem_shmem_madvise_locked() without holding the GEM object's reservation lock, violating the helper's locking requirement. Low privileges and local execution are required; the affected path is a KUnit test helper and is not exposed to regular DRM drivers.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper locking in Linux Kernel 6.16 through 6.18.15 and 6.19 through 6.19.5 allows local users to trigger a DRM shmem warning. The KUnit shmem tests call drm_gem_shmem_madvise_locked() without holding the GEM object's reservation lock, violating the helper's locking requirement. Low privileges and local execution are required; the affected path is a KUnit test helper and is not exposed to regular DRM drivers.

The record

CVE
CVE-2025-71298
Published
May 8, 2026
Updated
May 8, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 8, 2026CVE publishedPublication date reported by the CVE source.
  2. May 8, 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=6.16
  2. Affected versionversion=954907f7147dc43e0d1cd4d430c21d143d5fdf55 <07cfcab370da06f26c273306571cbb0bfa3b9c52
  3. Affected versionversion=954907f7147dc43e0d1cd4d430c21d143d5fdf55 <607d07d8cc0b835a8701259f08a03dc149b79b4f
  4. Affected versionversion=954907f7147dc43e0d1cd4d430c21d143d5fdf55 <9cc77691b5fd615625955cedf726da57543088f1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.16; version=954907f7147dc43e0d1cd4d430c21d143d5fdf55 <07cfcab370da06f26c273306571cbb0bfa3b9c52; version=954907f7147dc43e0d1cd4d430c21d143d5fdf55 <607d07d8cc0b835a8701259f08a03dc149b79b4f; version=954907f7147dc43e0d1cd4d430c21d143d5fdf55 <9cc77691b5fd615625955cedf726da57543088f1

Published CVSS scores

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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