SB20260320109 - Out-of-bounds read in Linux kernel infiniband core driver

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Main Vulnerability Database SB20260320109

SB20260320109 - Out-of-bounds read in Linux kernel infiniband core driver

Published: March 20, 2026

Security Bulletin ID SB20260320109
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 security vulnerability.


1) Out-of-bounds read (CVE-ID: CVE-2026-23243)

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

The vulnerability exists due to a boundary error in the RDMA/umad component when processing user-controlled MAD headers. A local user can send a specially crafted request with mismatched MAD header size and RMPP header length to cause a denial of service.

Exploitation requires access to the RDMA UMAD interface. The vulnerability can trigger an out-of-bounds write in kernel memory, leading to system instability or crash.


Remediation

Install update from vendor's website.

References