SB2026100722 - Memory leak in Linux kernel infiniband core driver

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Main Vulnerability Database SB2026100722

SB2026100722 - Memory leak in Linux kernel infiniband core driver

Published: October 7, 2026

Security Bulletin ID SB2026100722
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Partial DoS

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Memory leak (CVE-ID: CVE-2026-98354)

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service through memory exhaustion.

The vulnerability exists due to a receive buffer memory leak in ib_mad_complete_recv() in the RDMA MAD subsystem when processing management datagrams that fail PKey enforcement. A remote attacker can repeatedly send management datagrams with an incorrect PKey to cause a denial of service through memory exhaustion.

Each rejected datagram leaks approximately 300 bytes for an InfiniBand port or approximately 2 KB for OPA.


Remediation

Install update from vendor's website.

References