SB2026052859 - Out-of-bounds read in Linux kernel misc ibmasm driver

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Main Vulnerability Database SB2026052859

SB2026052859 - Out-of-bounds read in Linux kernel misc ibmasm driver

Published: May 28, 2026

Security Bulletin ID SB2026052859
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-2026-46022)

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

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote user to cause a denial of service.

The vulnerability exists due to an out-of-bounds read in ibmasm_handle_mouse_interrupt() when handling a mouse interrupt with out-of-range queue reader or writer indices from MMIO registers. A remote privileged user can write a crafted out-of-range value to the reader or writer MMIO register before asserting an interrupt to cause a denial of service.

For sufficiently large index values, the resulting MMIO access can fall outside the PCI BAR mapping and trigger a machine check exception.


Remediation

Install update from vendor's website.

References