https://cve.radiocsirt.org Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Wed, 07 Oct 2026 00:49:30 +0000 https://cve.radiocsirt.org/vuln/cve-2026-81009 <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>io_uring/query: cap user size passed to copy_struct_to_user</p> <p>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.</p> <p>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.</p> <p>Reject sizes larger than PAGE_SIZE, as recommended for copy_struct_* interfaces.</p> <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>io_uring/query: cap user size passed to copy_struct_to_user</p> <p>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.</p> <p>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.</p> <p>Reject sizes larger than PAGE_SIZE, as recommended for copy_struct_* interfaces.</p> https://cve.radiocsirt.org/vuln/cve-2026-81009