Bug 1211540 (CVE-2023-32258)

Summary:	VUL-0: CVE-2023-32258: kernel: Linux Kernel ksmbd Session Race Condition Remote Code Execution Vulnerability
Product:	[openSUSE] openSUSE Tumbleweed	Reporter:	Stoyan Manolov <stoyan.manolov>
Component:	Kernel	Assignee:	Enzo Matsumiya <ematsumiya>
Status:	RESOLVED UPSTREAM	QA Contact:	E-mail List <qa-bugs>
Severity:	Major
Priority:	P3 - Medium	CC:	ddiss, meissner, mkoutny, security-team
Version:	Current
Target Milestone:	---
Hardware:	Other
OS:	Other
URL:	https://smash.suse.de/issue/366964/
Whiteboard:
Found By:	Security Response Team	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---

Description Stoyan Manolov 2023-05-19 07:36:54 UTC

CVE-2023-32258

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_LOGOFF and SMB2_CLOSE
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-2023-32258
https://www.zerodayinitiative.com/advisories/ZDI-23-706/

Comment 2 Michal Koutný 2023-05-22 16:30:25 UTC

https://github.com/torvalds/linux/commit/abcc506a9a71976a8b4c9bf3ee6efd13229c1e19

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