Bug 1211534 (CVE-2023-32252) - VUL-0: CVE-2023-32252: kernel: Linux Kernel ksmbd Session NULL Pointer Dereference Denial-of-Service Vulnerability
Summary: VUL-0: CVE-2023-32252: kernel: Linux Kernel ksmbd Session NULL Pointer Derefe...
Status: RESOLVED UPSTREAM
Alias: CVE-2023-32252
Product: openSUSE Tumbleweed
Classification: openSUSE
Component: Kernel (show other bugs)
Version: Current
Hardware: Other Other
: P3 - Medium : Major (vote)
Target Milestone: ---
Assignee: Security Team bot
QA Contact: E-mail List
URL: https://smash.suse.de/issue/366970/
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Reported: 2023-05-19 07:35 UTC by Stoyan Manolov
Modified: 2023-05-25 06:24 UTC (History)
4 users (show)

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Found By: Security Response Team
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Description Stoyan Manolov 2023-05-19 07:35:02 UTC 
CVE-2023-32252

This vulnerability allows remote attackers to create a denial-of-service
condition 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 handling of SMB2_LOGOFF commands. The issue
results from the lack of proper validation of a pointer prior to accessing it.
An attacker can leverage this vulnerability to create a denial-of-service
condition on the system.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-32252
https://www.zerodayinitiative.com/advisories/ZDI-23-700/
Comment 2 Michal Koutný 2023-05-22 16:30:02 UTC 
https://github.com/torvalds/linux/commit/f5c779b7ddbda30866cf2a27c63e34158f858c73

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