CVE-2026-74297

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/mlx5: Fix undefined shift of user RQ WQE size set_rq_size() computes the RQ WQE size as "1 << rq_wqe_shift" based on the user-provided rq_wqe_shift, which is only checked to be greater than 32, so shifts of 32 are still accepted. A shift of 31 also overflows a signed integer, leading to undefined behavior. Use check_shl_overflow() to compute the RQ WQE size and reject any invalid values.

References

• https://git.kernel.org/stable/c/42f3d2c8c18b92ea33e506a38b64f1a8986c2823
• https://git.kernel.org/stable/c/4b87a2497276a72fd63028e7419abf0fb7ed837b
• https://git.kernel.org/stable/c/6fc874fdfb366bfb11c62e6af9a831c8be59ddda
• https://git.kernel.org/stable/c/9fff54929cc00849d738faa99f06c32399aeb026
• https://git.kernel.org/stable/c/b732db02a2b04cde393638df19de6251ce62a74e