CVE-2026-64018

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.

CVSS 3.1

9.3CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

EPSS

0.1% chance of exploitation in the next 30 days; higher than 3% of CVEs (scores of 2026-10-25)

CWEs

CWE-129, CWE-125

Published

2026-07-19

Modified

2026-10-19

Record from

the NVD, synced 2026-10-21

Affected

• linux:linux_kernel

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

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