CVE-2023-53047: linux kernel — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: tee: amdtee: fix race condition in amdtee_open_session There is a potential race condition in amdtee_open_session that may lead to use-after-free. For instance, in amdtee_open_session() after sess->sess_mask is set, and before setting: sess->session_info[i] = session_info; if amdtee_close_session() closes this same session, then 'sess' data structure will be released, causing kernel panic when 'sess' is accessed within amdtee_open_session(). The solution is to set the bit sess->sess_mask as the last step in amdtee_open_session().

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CVSS v3.1 Score

4.7

MEDIUM

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

Weakness Type (CWE)

CWE-362 CWE-362

Affected Products

Vendor	Product	Versions
linux	linux_kernel	5.6 — 5.10.177
linux	linux_kernel	5.11 — 5.15.105
linux	linux_kernel	5.16 — 6.1.22
linux	linux_kernel	6.2 — 6.2.9
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/02b296978a2137d7128151c542e84dc96400bc00 https://git.kernel.org/stable/c/a63cce9393e4e7dbc5af82dc87e68cb321cb1a78 https://git.kernel.org/stable/c/b3ef9e6fe09f1a132af28c623edcf4d4f39d9f35 https://git.kernel.org/stable/c/f632a90f8e39db39b322107b9a8d438b826a7f4f https://git.kernel.org/stable/c/f8502fba45bd30e1a6a354d9d898bc99d1a11e6d

Frequently Asked Questions

What is CVE-2023-53047? +

In the Linux kernel, the following vulnerability has been resolved: tee: amdtee: fix race condition in amdtee_open_session There is a potential race condition in amdtee_open_session that may lead to use-after-free. For instance, in amdtee_open_session() after sess->sess_mask is set, and before setting: sess->session_info[i] = session_info; if amdtee_close_session() closes this same session, then 'sess' data structure will be released, causing kernel panic when 'sess' is accessed within amdtee_open_session(). The solution is to set the bit sess->sess_mask as the last step in amdtee_open_session(). It has a CVSS v3.1 base score of 4.7 (MEDIUM).

How severe is CVE-2023-53047? +

CVE-2023-53047 has a CVSS v3.1 score of 4.7 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2023-53047? +

CVE-2023-53047 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2023-53047? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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