CVE-2025-40039 | BDVDB-2026-299821 বিস্তারিত

বিবরণ#

কারিগরি বিবরণ উৎসের ভাষা ইংরেজিতে রাখা হয়েছে, যাতে অনুবাদে অর্থ না বদলায়।

In the Linux kernel, the following vulnerability has been resolved: ksmbd: Fix race condition in RPC handle list access The 'sess->rpc_handle_list' XArray manages RPC handles within a ksmbd session. Access to this list is intended to be protected by 'sess->rpc_lock' (an rw_semaphore). However, the locking implementation was flawed, leading to potential race conditions. In ksmbd_session_rpc_open(), the code incorrectly acquired only a read lock before calling xa_store() and xa_erase(). Since these operations modify the XArray structure, a write lock is required to ensure exclusive access and prevent data corruption from concurrent modifications. Furthermore, ksmbd_session_rpc_method() accessed the list using xa_load() without holding any lock at all. This could lead to reading inconsistent data or a potential use-after-free if an entry is concurrently removed and the pointer is dereferenced. Fix these issues by: 1. Using down_write() and up_write() in ksmbd_session_rpc_open() to ensure exclusive access during XArray modification, and ensuring the lock is correctly released on error paths. 2. Adding down_read() and up_read() in ksmbd_session_rpc_method() to safely protect the lookup.

প্রভাব#

দুর্বলতার ধরন#

রেফারেন্স#

এক্সপ্লয়েট#

ইতিহাস#

1. ভার্সন ১2025-10-28CVE তালিকায় রেকর্ডটি প্রকাশিত হয়েছে।
2. ভার্সন ২2026-08-05CVE তালিকায় নথিভুক্ত সর্বশেষ হালনাগাদ।