Bug 2326531 (CVE-2023-39180)

Summary: CVE-2023-39180 kernel: ksmbd: Read Request Memory Leak Denial-of-Service Vulnerability
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found within the handling of SMB2_READ commands in the kernel ksmbd module. The issue results from not releasing memory after its effective lifetime. An attacker can leverage this to create a denial-of-service condition on affected installations of Linux. Authentication is not required to exploit this vulnerability, but only systems with ksmbd enabled are vulnerable.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2024-11-15 17:07:23 UTC 
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_READ commands. The issue results from not releasing memory after its effective lifetime. An attacker can leverage this vulnerability to create a denial-of-service condition on the system.

Reference:
https://www.zerodayinitiative.com/advisories/ZDI-24-589/
Comment 1 Mauro Matteo Cascella 2024-11-15 17:07:46 UTC 
Upstream patch:
https://lore.kernel.org/lkml/20230813160006.1073695-11-sashal@kernel.org/