CVE-2025-71187

Service interruption via leaked ICU device references

Published Jan 31, 2026 · Updated Jan 31, 2026

Device reference leakage in the rz-dmac driver in Linux Kernel allows local users to interrupt service through DMA-controller probe failures. rz_dmac_parse_of_icu() obtains an ICU platform-device reference but returns from failed setup paths without releasing it. Reachability requires a Renesas RZ/V2H(P) system using this driver and a failed or deferred probe; repeated failures leak references without enabling data access or modification.

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

What happened

Device reference leakage in the rz-dmac driver in Linux Kernel allows local users to interrupt service through DMA-controller probe failures. rz_dmac_parse_of_icu() obtains an ICU platform-device reference but returns from failed setup paths without releasing it. Reachability requires a Renesas RZ/V2H(P) system using this driver and a failed or deferred probe; repeated failures leak references without enabling data access or modification.

The record

CVE
CVE-2025-71187
Published
Jan 31, 2026
Updated
Jan 31, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-401, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 31, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 31, 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=7de873201c44bff5b42f2e560098d463843b8a4c <926d1666420c227eab50962a8622c1b8444720e8
  3. Affected versionversion=7de873201c44bff5b42f2e560098d463843b8a4c <9fb490323997dcb6f749cd2660a17a39854600cd

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.16; version=7de873201c44bff5b42f2e560098d463843b8a4c <926d1666420c227eab50962a8622c1b8444720e8; version=7de873201c44bff5b42f2e560098d463843b8a4c <9fb490323997dcb6f749cd2660a17a39854600cd

Published CVSS scores

5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.8SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

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

CWE-401Missing Release of Memory after Effective Lifetime
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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