loop_rw_iter in fs/io_uring.c in the Linux kernel 5.10 through 5.14.6 allows local users to gain privileges by using IORING_OP_PROVIDE_BUFFERS to trigger a free of a kernel buffer, as demonstrated by using /proc//maps for exploitation.
The product attempts to return a memory resource to the system, but it calls the wrong release function or calls the appropriate release function incorrectly.
Name | Vendor | Start Version | End Version |
---|---|---|---|
Linux_kernel | Linux | 5.10 (including) | 5.10.68 (excluding) |
Linux_kernel | Linux | 5.11 (including) | 5.14.7 (excluding) |
This weakness can take several forms, such as: