CVE-2025-71300

Kernel compromise via overlapping OP-TEE memory ownership

Published May 8, 2026 · Updated May 8, 2026

Memory corruption in the Linux Kernel allows local users to compromise ARM64 Xilinx ZynqMP systems through overlapping OP-TEE memory. The zynqmp.dtsi file supplies a manual OP-TEE node, preventing U-Boot from adding the reserved-memory node and allowing Linux and OP-TEE to own the same physical pages. Exposure requires the affected ZynqMP boot flow; an unprivileged local process can expose data, corrupt kernel allocations, or crash the host through memory pressure or TEE shared-memory operations.

CVSS severity7.8
High
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

Memory corruption in the Linux Kernel allows local users to compromise ARM64 Xilinx ZynqMP systems through overlapping OP-TEE memory. The zynqmp.dtsi file supplies a manual OP-TEE node, preventing U-Boot from adding the reserved-memory node and allowing Linux and OP-TEE to own the same physical pages. Exposure requires the affected ZynqMP boot flow; an unprivileged local process can expose data, corrupt kernel allocations, or crash the host through memory pressure or TEE shared-memory operations.

The record

CVE
CVE-2025-71300
Published
May 8, 2026
Updated
May 8, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1068, 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

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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=06d22ed6b6635b17551f386b50bb5aaff9b75fbe <2a833c730d4e8d1cc10953270ce0f3a156145d81
  2. Affected versionversion=06d22ed6b6635b17551f386b50bb5aaff9b75fbe <3983ef126e439900bbf419724a9759863c146660
  3. Affected versionversion=06d22ed6b6635b17551f386b50bb5aaff9b75fbe <c197179990124f991fca220d97fac56779a02c6d
  4. Affected versionversion=06d22ed6b6635b17551f386b50bb5aaff9b75fbe <eece81eeda10eb42c687399fb5aa69977ae15664
  5. Affected versionversion=6.9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=06d22ed6b6635b17551f386b50bb5aaff9b75fbe <2a833c730d4e8d1cc10953270ce0f3a156145d81; version=06d22ed6b6635b17551f386b50bb5aaff9b75fbe <3983ef126e439900bbf419724a9759863c146660; version=06d22ed6b6635b17551f386b50bb5aaff9b75fbe <c197179990124f991fca220d97fac56779a02c6d; version=06d22ed6b6635b17551f386b50bb5aaff9b75fbe <eece81eeda10eb42c687399fb5aa69977ae15664; version=6.9

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
8.5SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.8SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8kernel.orgCVSS: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.

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

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

T1068Exploitation for Privilege Escalation
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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