Bug 1211536 (CVE-2023-32254) - VUL-0: CVE-2023-32254: kernel: Linux Kernel ksmbd Tree Connection Race Condition Remote Code Execution Vulnerability
Summary: VUL-0: CVE-2023-32254: kernel: Linux Kernel ksmbd Tree Connection Race Condit...
Status: RESOLVED UPSTREAM
Alias: CVE-2023-32254
Product: openSUSE Tumbleweed
Classification: openSUSE
Component: Kernel (show other bugs)
Version: Current
Hardware: Other Other
: P3 - Medium : Critical (vote)
Target Milestone: ---
Assignee: Security Team bot
QA Contact: E-mail List
URL: https://smash.suse.de/issue/366968/
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Reported: 2023-05-19 07:35 UTC by Stoyan Manolov
Modified: 2023-05-25 06:23 UTC (History)
4 users (show)

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Found By: Security Response Team
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Description Stoyan Manolov 2023-05-19 07:35:39 UTC 
CVE-2023-32254

This vulnerability allows remote attackers to execute arbitrary code on affected
installations of Linux Kernel. Authentication is not required to exploit this
vulnerability, but only systems with ksmbd enabled are vulnerable.

The specific flaw exists within the processing of SMB2_TREE_DISCONNECT commands.
The issue results from the lack of proper locking when performing operations on
an object. An attacker can leverage this vulnerability to execute code in the
context of the kernel.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-32254
https://www.zerodayinitiative.com/advisories/ZDI-23-702/
Comment 2 Michal Koutný 2023-05-22 16:30:07 UTC 
https://github.com/torvalds/linux/commit/30210947a343b6b3ca13adc9bfc88e1543e16dd5

(someone gives this CVSS 9.8 :-o)

Possibly needed in the `stable` branch before v6.4 is out.