Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: io_uring/query: cap user size passed to copy_struct_to_user io_handle_query_entry() clamps hdr.size for the inbound copy_from_user() but keeps the original user value as usize. copy_struct_to_user() uses that usize and, when it is larger than the kernel result, clear_user()s the trailing bytes. As hdr.size is a __u32, a query can request nearly 4 GiB of zeroing, including on the error path where res_size stays 0. The interface is reachable without a ring via IORING_REGISTER_QUERY. Reject sizes larger than PAGE_SIZE, as recommended for copy_struct_* interfaces.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected c265ae75f900cea4e415230a77b5d152377627dd before 417e02f7b6051765b91cf1289071882eebd172e0; affected c265ae75f900cea4e415230a77b5d152377627dd before 2b8ad4981ecedb14c1fdd811ab977010b23933e6; affected c265ae75f900cea4e415230a77b5d152377627dd before ba77efee1b95b4ad7559b1cdbe7cd7fa36dca95b |
| Linux / Linux | affected 6.18; unaffected 0 before 6.18; unaffected 6.18.50 through 6.18.*; unaffected 7.2.4 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.