Bug 2367573 (CVE-2025-37962)

Summary: CVE-2025-37962 kernel: ksmbd: fix memory leak in parse_lease_state()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: low    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-05-20 17:01:33 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ksmbd: fix memory leak in parse_lease_state()

The previous patch that added bounds check for create lease context
introduced a memory leak. When the bounds check fails, the function
returns NULL without freeing the previously allocated lease_ctx_info
structure.

This patch fixes the issue by adding kfree(lreq) before returning NULL
in both boundary check cases.
Comment 1 Jon Moroney 2025-05-21 01:20:59 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025052005-CVE-2025-37962-9f38@gregkh/T