SB20260720219 - Out-of-bounds read in Linux kernel microsoft mana driver

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Main Vulnerability Database SB20260720219

SB20260720219 - Out-of-bounds read in Linux kernel microsoft mana driver

Published: July 20, 2026

Security Bulletin ID SB20260720219
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds read (CVE-ID: CVE-2026-64018)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local attacker to cause a denial of service.

The vulnerability exists due to an out-of-bounds read in mana_hwc_rx_event_handler() when processing hardware-modifiable WQE contents from DMA-coherent memory. A local attacker can modify the derived rx_req_idx value to cause a denial of service.

In confidential VMs such as SEV-SNP and TDX, the affected DMA-coherent memory is shared unencrypted and hardware can modify WQE contents at any time.


Remediation

Install update from vendor's website.

References