smb/server: fix potential null-ptr-deref of lease_ctx_info in smb2_open()
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: smb/server: fix potential null-ptr-deref of lease_ctx_info in smb2_open() null-ptr-deref will occur when (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) and parse_lease_state() return NULL. Fix this by check if 'lease_ctx_info' is NULL. Additionally, remove the redundant parentheses in parse_durable_handle_context().
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
- https://git.kernel.org/stable/c/878f32878351104448b86ef5b85d1f8ed6f599fb
- https://git.kernel.org/stable/c/ec28c35029b7930f31117f9284874b63bea4f31b
- https://git.kernel.org/stable/c/07f384c5be1f8633b13f0a22616e227570450bc6
- https://git.kernel.org/stable/c/3b692794b81f2ecad69a4adbba687f3836824ada
- https://git.kernel.org/stable/c/4e8771a3666c8f216eefd6bd2fd50121c6c437db
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