Detections
Analytics
CVE-2023-53820
medium
Description
In the Linux kernel, the following vulnerability has been resolved: loop: loop_set_status_from_info() check before assignment In loop_set_status_from_info(), lo->lo_offset and lo->lo_sizelimit should be checked before reassignment, because if an overflow error occurs, the original correct value will be changed to the wrong value, and it will not be changed back. More, the original patch did not solve the problem, the value was set and ioctl returned an error, but the subsequent io used the value in the loop driver, which still caused an alarm: loop_handle_cmd do_req_filebacked loff_t pos = ((loff_t) blk_rq_pos(rq) << 9) + lo->lo_offset; lo_rw_aio cmd->iocb.ki_pos = pos
References
https://git.kernel.org/stable/c/c79a924ed6afac1708dfd370ba66bcf6a852ced6
https://git.kernel.org/stable/c/9f6ad5d533d1c71e51bdd06a5712c4fbc8768dfa
https://git.kernel.org/stable/c/861021710bba9dfa0749a3c209a6c1773208b1f1
https://git.kernel.org/stable/c/832580af82ace363205039a8e7c4ef04552ccc1a
https://git.kernel.org/stable/c/4be26d553a3f1d4f54f25353d1496c562002126d
https://git.kernel.org/stable/c/3e7d0968203d668af6036b9f9199c7b62c8a3581
https://git.kernel.org/stable/c/258809bf22bf71d53247856f374f2b1d055f2fd4