CVE-2025-71301

Kernel service interruption via unlocked shmem mapping

Published May 8, 2026 · Updated May 8, 2026

Improper locking in DRM KUnit shmem tests in affected Linux Kernel versions allows local users to interrupt kernel service. The shmem test calls drm_gem_shmem_vmap_locked and drm_gem_shmem_vunmap_locked without holding the GEM object's reservation lock, triggering warnings in page-pinning, mapping, and unmapping paths. Low-privilege local access is required, and the helpers are limited to KUnit tests rather than regular driver interfaces; the published impact is availability loss without confidentiality or integrity impact.

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 DRM KUnit shmem tests in affected Linux Kernel versions allows local users to interrupt kernel service. The shmem test calls drm_gem_shmem_vmap_locked and drm_gem_shmem_vunmap_locked without holding the GEM object's reservation lock, triggering warnings in page-pinning, mapping, and unmapping paths. Low-privilege local access is required, and the helpers are limited to KUnit tests rather than regular driver interfaces; the published impact is availability loss without confidentiality or integrity impact.

The record

CVE
CVE-2025-71301
Published
May 8, 2026
Updated
May 8, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
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

Compare your product and version with the public record. A matching version still requires validation against your environment.

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 <6b953d92f2f29e74b125617c6f00300fa1bed97e
  3. Affected versionversion=954907f7147dc43e0d1cd4d430c21d143d5fdf55 <cda83b099f117f2a28a77bf467af934cb39e49cf
  4. Affected versionversion=954907f7147dc43e0d1cd4d430c21d143d5fdf55 <e7b7022f11d3cf281c726117478696b83681bf11

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.16; version=954907f7147dc43e0d1cd4d430c21d143d5fdf55 <6b953d92f2f29e74b125617c6f00300fa1bed97e; version=954907f7147dc43e0d1cd4d430c21d143d5fdf55 <cda83b099f117f2a28a77bf467af934cb39e49cf; version=954907f7147dc43e0d1cd4d430c21d143d5fdf55 <e7b7022f11d3cf281c726117478696b83681bf11

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.

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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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