Medium · published May 17, 2024
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.
| Product | Versions | Fixed in |
|---|---|---|
| linux/linux_kernel | ≥ 4.19.308, < 4.19.312 | 4.19.312 |
| linux/linux_kernel | ≥ 5.4.270, < 5.4.274 | 5.4.274 |
| linux/linux_kernel | ≥ 5.10.211, < 5.10.215 | 5.10.215 |
| linux/linux_kernel | ≥ 5.15.150, < 5.15.154 | 5.15.154 |
| linux/linux_kernel | ≥ 6.1.80, < 6.1.84 | 6.1.84 |
| linux/linux_kernel | ≥ 6.6.19, < 6.6.24 | 6.6.24 |
| linux/linux_kernel | ≥ 6.7.7, < 6.7.12 | 6.7.12 |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| debian/debian_linux | all versions | — |