Title:ksmbd: prevent out-of-bounds stream writes by validating *pos
(CVE-2025-37947) Description:In the Linux kernel, the following vulnerability has been resolved:
ksmbd: prevent out-of-bounds stream writes by validating *pos
ksmbd_vfs_stream_write() did not validate whether the write offset
(*pos) was within the bounds of the existing stream data length (v_len).
If *pos was greater than or equal to v_len, this could lead to an
out-of-bounds memory write.
This patch adds a check to ensure *pos is less than v_len before
proceeding. If the condition fails, -EINVAL is returned.
Description
Blog Post: https://blog.doyensec.com/2025/10/08/ksmbd-3.html
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