CVE-2025-71071

Unsafe kernel memory access via premature larb release

Published Jan 13, 2026 · Updated Jan 13, 2026

Use-after-free in the MediaTek IOMMU driver in Linux Kernel allows local users to trigger unsafe kernel memory access during probe deferral. The device-tree parsing path releases larb device references after lookup on success and error paths, leaving deferred probe state with dangling pointers. Triggering requires CAP_SYS_MODULE to initiate driver probing, while kernel-internal timing controls deferral; no controlled post-trigger impact is documented.

CVSS severity7.8
High
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

Use-after-free in the MediaTek IOMMU driver in Linux Kernel allows local users to trigger unsafe kernel memory access during probe deferral. The device-tree parsing path releases larb device references after lookup on success and error paths, leaving deferred probe state with dangling pointers. Triggering requires CAP_SYS_MODULE to initiate driver probing, while kernel-internal timing controls deferral; no controlled post-trigger impact is documented.

The record

CVE
CVE-2025-71071
Published
Jan 13, 2026
Updated
Jan 13, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jan 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 13, 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=26593928564cf5b576ff05d3cbd958f57c9534bb <1ef70a0b104ae8011811f60bcfaa55ff49385171
  2. Affected versionversion=26593928564cf5b576ff05d3cbd958f57c9534bb <5c04217d06a1161aaf36267e9d971ab6f847d5a7
  3. Affected versionversion=26593928564cf5b576ff05d3cbd958f57c9534bb <de83d4617f9fe059623e97acf7e1e10d209625b5
  4. Affected versionversion=26593928564cf5b576ff05d3cbd958f57c9534bb <f6c08d3aa441bbc1956e9d65f1cbb89113a5aa8a
  5. Affected versionversion=51080de72e26771f0ed9d44982974279ccbc92b8
  6. Affected versionversion=6.2
  7. Affected versionversion=8412e5dd24ffc8bc21a00bfaa0b80d4596cdc9da <896ec55da3b90bdb9fc04fedc17ad8c359b2eee5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linux Kernelversion=26593928564cf5b576ff05d3cbd958f57c9534bb <1ef70a0b104ae8011811f60bcfaa55ff49385171; version=26593928564cf5b576ff05d3cbd958f57c9534bb <5c04217d06a1161aaf36267e9d971ab6f847d5a7; version=26593928564cf5b576ff05d3cbd958f57c9534bb <de83d4617f9fe059623e97acf7e1e10d209625b5; version=26593928564cf5b576ff05d3cbd958f57c9534bb <f6c08d3aa441bbc1956e9d65f1cbb89113a5aa8a; version=51080de72e26771f0ed9d44982974279ccbc92b8; version=6.2; version=8412e5dd24ffc8bc21a00bfaa0b80d4596cdc9da <896ec55da3b90bdb9fc04fedc17ad8c359b2eee5

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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