Bug 2439927 (CVE-2025-71204)

Summary: CVE-2025-71204 kernel: smb/server: fix refcount leak in parse_durable_handle_context()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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A reference count leak flaw was found in the Linux kernel's ksmbd in-kernel SMB server. In the parse_durable_handle_context() function, when a command is detected as a replay operation and returns -ENOEXEC, the reference count of the ksmbd_file structure is not properly released. This leads to a resource leak that could result in gradual memory exhaustion over time.
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Description OSIDB Bzimport 2026-02-14 17:03:27 UTC 
In the Linux kernel, the following vulnerability has been resolved:

smb/server: fix refcount leak in parse_durable_handle_context()

When the command is a replay operation and -ENOEXEC is returned,
the refcount of ksmbd_file must be released.
Comment 1 TEJ RATHI 2026-02-16 06:52:18 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026021425-CVE-2025-71204-88b2@gregkh/T