CVE-2026-64018

Description

In the Linux kernel, the following vulnerability has been resolved: net: mana: validate rx_req_idx to prevent out-of-bounds array access In mana_hwc_rx_event_handler(), rx_req_idx is derived from sge->address in DMA-coherent memory. In Confidential VMs (SEV-SNP/TDX), this memory is shared unencrypted and HW can modify WQE contents at any time. No bounds check exists on rx_req_idx, which can lead to an out-of-bounds access into reqs[]. Add bounds check on rx_req_idx in mana_hwc_rx_event_handler() before using it to index the reqs[] array.

References

• https://git.kernel.org/stable/c/01f7f893d5e1baae995beeb86cd0f3e6bb2a3b01
• https://git.kernel.org/stable/c/355e9f2b2a7887ca38100127989af3e422ba71d0
• https://git.kernel.org/stable/c/5ddc715324badd7f2641bc177db1d027b402adae
• https://git.kernel.org/stable/c/763a372d344fb12fae566d36ddb46e92454ad58c
• https://git.kernel.org/stable/c/b809d0409991b75a6cff846a5ac27c3062953f84