In the Linux kernel, the following vulnerability has been resolved:
fs/aio: Check IOCB_AIO_RW before the struct aio_kiocb conversion
The first kiocb_set_cancel_fn() argument may point at a struct kiocb that is not embedded inside struct aio_kiocb. With the current code, depending on the compiler, the req->ki_ctx read happens either before the IOCB_AIO_RW test or after that test. Move the req->ki_ctx read such that it is guaranteed that the IOCB_AIO_RW test happens first.
| Software | From | Fixed in |
|---|---|---|
| linux / linux_kernel | 4.19.308 | 4.19.312 |
| linux / linux_kernel | 5.4.270 | 5.4.274 |
| linux / linux_kernel | 5.10.211 | 5.10.215 |
| linux / linux_kernel | 5.15.150 | 5.15.154 |
| linux / linux_kernel | 6.1.80 | 6.1.84 |
| linux / linux_kernel | 6.6.19 | 6.6.24 |
| linux / linux_kernel | 6.7.7 | 6.7.12 |
| linux / linux_kernel | 6.8-rc6 | 6.8-rc6.x |
| linux / linux_kernel | 6.8-rc7 | 6.8-rc7.x |
| debian / debian_linux | 10.0 | 10.0.x |