Total vulnerabilities in the database
The io_uring subsystem in the Linux kernel allowed the MAX_RW_COUNT limit to be bypassed in the PROVIDE_BUFFERS operation, which led to negative values being usedin mem_rw when reading /proc/<PID>/mem. This could be used to create a heap overflow leading to arbitrary code execution in the kernel. It was addressed via commit d1f82808877b ("io_uring: truncate lengths larger than MAX_RW_COUNT on provide buffers") (v5.13-rc1) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. It was introduced in ddf0322db79c ("io_uring: add IORING_OP_PROVIDE_BUFFERS") (v5.7-rc1).
| Software | From | Fixed in |
|---|---|---|
| linux / linux_kernel | 5.11 | 5.11.21 |
| linux / linux_kernel | 5.12 | 5.12.4 |
| linux / linux_kernel | 5.7 | 5.10.37 |
| canonical / ubuntu_linux | 20.04 | 20.04.x |
| canonical / ubuntu_linux | 20.10 | 20.10.x |
| canonical / ubuntu_linux | 21.04 | 21.04.x |