CVE-2023-53047

Kernel compromise via AMD TEE session race

Published May 2, 2025 · Updated Aug 5, 2026

Use-after-free in the Linux AMD TEE driver allows local users to crash the kernel or execute code via concurrent session ioctls. amdtee_open_session marks a session active before storing its session information, allowing amdtee_close_session to free the session while initialization still accesses it. Access to the TEE device is required; winning the race permits a kernel panic or host-kernel memory control within the same OS security authority.

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

Use-after-free in the Linux AMD TEE driver allows local users to crash the kernel or execute code via concurrent session ioctls. amdtee_open_session marks a session active before storing its session information, allowing amdtee_close_session to free the session while initialization still accesses it. Access to the TEE device is required; winning the race permits a kernel panic or host-kernel memory control within the same OS security authority.

The record

CVE
CVE-2023-53047
Published
May 2, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 2, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=5.6
  2. Affected versionversion=757cc3e9ff1d72d014096399d6e2bf03974d9da1 <02b296978a2137d7128151c542e84dc96400bc00
  3. Affected versionversion=757cc3e9ff1d72d014096399d6e2bf03974d9da1 <a63cce9393e4e7dbc5af82dc87e68cb321cb1a78
  4. Affected versionversion=757cc3e9ff1d72d014096399d6e2bf03974d9da1 <b3ef9e6fe09f1a132af28c623edcf4d4f39d9f35
  5. Affected versionversion=757cc3e9ff1d72d014096399d6e2bf03974d9da1 <f632a90f8e39db39b322107b9a8d438b826a7f4f
  6. Affected versionversion=757cc3e9ff1d72d014096399d6e2bf03974d9da1 <f8502fba45bd30e1a6a354d9d898bc99d1a11e6d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.6; version=757cc3e9ff1d72d014096399d6e2bf03974d9da1 <02b296978a2137d7128151c542e84dc96400bc00; version=757cc3e9ff1d72d014096399d6e2bf03974d9da1 <a63cce9393e4e7dbc5af82dc87e68cb321cb1a78; version=757cc3e9ff1d72d014096399d6e2bf03974d9da1 <b3ef9e6fe09f1a132af28c623edcf4d4f39d9f35; version=757cc3e9ff1d72d014096399d6e2bf03974d9da1 <f632a90f8e39db39b322107b9a8d438b826a7f4f; version=757cc3e9ff1d72d014096399d6e2bf03974d9da1 <f8502fba45bd30e1a6a354d9d898bc99d1a11e6d

Published CVSS scores

5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.7NIST NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8Linux CNACVSS: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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation
T1068Exploitation for Privilege Escalation

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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