CVE-2023-52503

Kernel memory corruption via racy session teardown

Published Mar 2, 2024 · Updated Aug 5, 2026

Use-after-free in the Linux AMD-TEE driver allows local users to corrupt kernel memory by racing session open and close operations. amdtee_close_session decrements the final reference before destroy_session removes the session from the shared list, allowing amdtee_open_session to reacquire an object that teardown later frees. Exploitation requires local low-privileged access and a concurrent close/open race; effects include a kernel crash or compromise of kernel data.

CVSS severity7.0
High
EPSS probability0.26%
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 corrupt kernel memory by racing session open and close operations. amdtee_close_session decrements the final reference before destroy_session removes the session from the shared list, allowing amdtee_open_session to reacquire an object that teardown later frees. Exploitation requires local low-privileged access and a concurrent close/open race; effects include a kernel crash or compromise of kernel data.

The record

CVE
CVE-2023-52503
Published
Mar 2, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 2, 2024CVE 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

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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=5.6
  2. Affected versionversion=757cc3e9ff1d72d014096399d6e2bf03974d9da1 <1680c82929bc14d706065f123dab77f2f1293116
  3. Affected versionversion=757cc3e9ff1d72d014096399d6e2bf03974d9da1 <1c95574350cd63bc3c5c2fa06658010768f2a0ce
  4. Affected versionversion=757cc3e9ff1d72d014096399d6e2bf03974d9da1 <60c3e7a00db954947c265b55099c21b216f2a05c
  5. Affected versionversion=757cc3e9ff1d72d014096399d6e2bf03974d9da1 <da7ce52a2f6c468946195b116615297d3d113a27
  6. Affected versionversion=757cc3e9ff1d72d014096399d6e2bf03974d9da1 <f4384b3e54ea813868bb81a861bf5b2406e15d8f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.6; version=757cc3e9ff1d72d014096399d6e2bf03974d9da1 <1680c82929bc14d706065f123dab77f2f1293116; version=757cc3e9ff1d72d014096399d6e2bf03974d9da1 <1c95574350cd63bc3c5c2fa06658010768f2a0ce; version=757cc3e9ff1d72d014096399d6e2bf03974d9da1 <60c3e7a00db954947c265b55099c21b216f2a05c; version=757cc3e9ff1d72d014096399d6e2bf03974d9da1 <da7ce52a2f6c468946195b116615297d3d113a27; version=757cc3e9ff1d72d014096399d6e2bf03974d9da1 <f4384b3e54ea813868bb81a861bf5b2406e15d8f

Published CVSS scores

7.0NIST NVDCVSS:3.1/AV:L/AC:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
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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