PT-2026-61335 · Linux · Linux

CVE-2026-64018 · Published 2026-07-19 · Updated 2026-07-19

Mitre

CVSS v3.1

9.3

Critical

Base vector

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

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.

Fix

Related Identifiers

CVE-2026-64018

Affected Products

Linux

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2026-64018 · Security Note
• https://git.kernel.org/stable/c/5ddc715324badd7f2641bc177db1d027b402adae · Note
• https://git.kernel.org/stable/c/763a372d344fb12fae566d36ddb46e92454ad58c · Note
• https://git.kernel.org/stable/c/01f7f893d5e1baae995beeb86cd0f3e6bb2a3b01 · Note
• https://git.kernel.org/stable/c/b809d0409991b75a6cff846a5ac27c3062953f84 · Note
• https://git.kernel.org/stable/c/355e9f2b2a7887ca38100127989af3e422ba71d0 · Note
• https://git.kernel.org/stable/c/fa627a5eaa83fc0261f44ef3769693b886ca6e27 · Note
• https://git.kernel.org/stable/c/ff1d5af207bcea857d45fe81505f1bc4b29eaef0 · Note