Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: io_uring: prevent reg-wait speculations With *ENTER_EXT_ARG_REG instead of passing a user pointer with arguments for the waiting loop the user can specify an offset into a pre-mapped region of memory, in which case the [offset, offset + sizeof(io_uring_reg_wait)) will be intepreted as the argument. As we address a kernel array using a user given index, it'd be a subject to speculation type of exploits. Use array_index_nospec() to prevent that. Make sure to pass not the full region size but truncate by the maximum offset allowed considering the structure size.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected aa00f67adc2c0d6439f81b5a81ff181377c47a7e before 2a6de94df7bfa76d9850443547e7b3333f63a16a; affected aa00f67adc2c0d6439f81b5a81ff181377c47a7e before 29b95ac917927ce9f95bf38797e16333ecb489b1 |
| Linux / Linux | affected 6.13; unaffected 0 before 6.13; unaffected 6.13.2 through 6.13.*; unaffected 6.14 through * |
CWE
No CWE identifiers supplied.