Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2026-64018

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
19/07/2026
Last modified:
30/07/2026

Description

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

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 9.30 CRITICAL
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Changed
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
9.30
Severity 3.x
CRITICAL

References to Advisories, Solutions, and Tools