What is CVE-2023-52503?

CVE-2023-52503 is a High severity Linux kernel vulnerability with a CVSS score of 7.0 out of 10, classified as a Use After Free flaw (CWE-416). CVE-2023-52503 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-52503?

CVE-2023-52503 has a CVSS score of 7.0 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2023-52503?

No patch is currently available for CVE-2023-52503. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2023-52503 actively exploited?

CVE-2023-52503 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/416.html

CVE-2023-52503

High

In the Linux kernel, the following vulnerability has been resolved: tee: amdtee: fix use-after-free vulnerability in amdtee_close_session There is a potential race condition in amdtee_close_session that may cause use-after-free in amdtee_open_session. For instance, if a session has refcount == 1, and one thread tries to free this session via: kref_put(&sess->refcount, destroy_session); the reference count will get decremented, and the next step would be to call destroy_session(). However, if in another thread, amdtee_open_session() is called before destroy_session() has completed execution, alloc_session() may return 'sess' that will be freed up later in destroy_session() leading to use-after-free in amdtee_open_session. To fix this issue, treat decrement of sess->refcount and removal of 'sess' from session list in destroy_session() as a critical section, so that it is executed atomically.

Package Linux Kernel

Published 2024-03-02

Last modified 2024-12-10

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

7.0

out of 10

High

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness type

CWE-416

CVE-2023-52503 is a Use After Free vulnerability

What is Use After Free?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2023-52503 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/1680c82929bc14d706065f123dab77f2f1293116
Patch
Kernel patch commit
https://git.kernel.org/stable/c/1c95574350cd63bc3c5c2fa06658010768f2a0ce
Patch
Kernel patch commit
https://git.kernel.org/stable/c/60c3e7a00db954947c265b55099c21b216f2a05c
Patch

5 patch commits total View all on NVD

Details

CVE ID CVE-2023-52503

Severity High

CVSS score 7.0 / 10

CVSS version 3.1

Published 2024-03-02

Modified 2024-12-10

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2023-52503?

CVE-2023-52503 is a High severity Linux kernel vulnerability with a CVSS score of 7.0 out of 10 , classified as an Use After Free flaw (CWE-416) . CVE-2023-52503 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-52503?

CVE-2023-52503 has a CVSS score of 7.0 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2023-52503?

No patch is currently available for CVE-2023-52503. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2023-52503 actively exploited?

No — CVE-2023-52503 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. View CWE-416 on MITRE CWE →