---
id: CVE-2026-98354
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  RDMA/mad: Fix receive buffer leak when PKey enforcement fails

  ib_mad_complete_recv() initializes mad_recv_wc->rmpp_list and then runs
  ib_mad_enforce_security() before …
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  RDMA/mad: Fix receive buffer leak when PKey enforcement fails

  ib_mad_complete_recv() initializes mad_recv_wc->rmpp_list and then runs
  ib_mad_enforce_security() before …
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 47a2b338fe63200d716d2e24131cdb49f17c77da <
    4617c9a856188674dddb0ca66979746d07688579
  - >-
    Linux >= 47a2b338fe63200d716d2e24131cdb49f17c77da <
    8e2036fb47a5b152d53eadbd35abf311bd34cc7f
  - >-
    Linux >= 47a2b338fe63200d716d2e24131cdb49f17c77da <
    bad289e42f512646a988f278f536d21547df73f1
  - >-
    Linux >= 47a2b338fe63200d716d2e24131cdb49f17c77da <
    752b30e9d339008e5ce7eed412e9446078916129
  - >-
    Linux >= 47a2b338fe63200d716d2e24131cdb49f17c77da <
    39c4ea72a40503e102ae07e6776005f96ca078a6
  - >-
    Linux >= 47a2b338fe63200d716d2e24131cdb49f17c77da <
    5091e25ec503f7fc02723ca435226467b68caac7
  - >-
    Linux >= 47a2b338fe63200d716d2e24131cdb49f17c77da <
    c0d8df85db146d6275e226cb950023be69dd6c77
  - >-
    Linux >= 47a2b338fe63200d716d2e24131cdb49f17c77da <
    3476c28c9addfa253f505e6bd87f1f5598b961d0
  - Linux 4.13
published: '2026-10-06'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T09:18:28.883'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98354'
references:
  - url: 'https://git.kernel.org/stable/c/3476c28c9addfa253f505e6bd87f1f5598b961d0'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/39c4ea72a40503e102ae07e6776005f96ca078a6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/4617c9a856188674dddb0ca66979746d07688579'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5091e25ec503f7fc02723ca435226467b68caac7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/752b30e9d339008e5ce7eed412e9446078916129'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8e2036fb47a5b152d53eadbd35abf311bd34cc7f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/bad289e42f512646a988f278f536d21547df73f1'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c0d8df85db146d6275e226cb950023be69dd6c77'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-06T08:50:17.395Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

RDMA/mad: Fix receive buffer leak when PKey enforcement fails

ib_mad_complete_recv() initializes mad_recv_wc->rmpp_list and then runs
ib_mad_enforce_security() before linking recv_buf onto that list.  On
failure it calls ib_free_recv_mad(), which only walks rmpp_list and frees
the ib_mad_private of every buffer found there.  As the list is still
empty at that point, nothing is freed at all.

The caller cannot clean up either: ib_mad_recv_done() sets recv to NULL
right after ib_mad_complete_recv() returns, assuming the MAD layer took
ownership of the buffer.  Every MAD that fails the PKey check therefore
leaks one ib_mad_private (about 300 bytes per IB port MAD, ~2K for OPA),
and a remote node can trigger this repeatedly by sending MADs with a
wrong PKey.

Link recv_buf onto rmpp_list right after the list is initialized, so the
error path has something to free.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.