---
id: CVE-2026-97413
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  RDMA/rtrs-srv: Fix integer underflow in process_read and process_write

  usr_len is read from a network-supplied message field (le16_to_cpu)
  and used to compute data_len…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  RDMA/rtrs-srv: Fix integer underflow in process_read and process_write

  usr_len is read from a network-supplied message field (le16_to_cpu)
  and used to compute data_len…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    24ad03bfeda05fca04c56677e57fd3d6bc3e9978
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    c76e9123ab91a903396d26e6ab1b5caae5c6b149
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    54bf38b27afc08a0eb6b732f9c14eb8a4bcb66b5
  - Linux < 6.12.111
  - Linux < 6.18.53
  - Linux (all versions)
published: '2026-09-24'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T13:17:24.830'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-97413'
references:
  - url: 'https://git.kernel.org/stable/c/24ad03bfeda05fca04c56677e57fd3d6bc3e9978'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/54bf38b27afc08a0eb6b732f9c14eb8a4bcb66b5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c76e9123ab91a903396d26e6ab1b5caae5c6b149'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-24T16:47:15.887Z'
---

## Overview

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

RDMA/rtrs-srv: Fix integer underflow in process_read and process_write

usr_len is read from a network-supplied message field (le16_to_cpu)
and used to compute data_len = off - usr_len without validating that
usr_len <= off. A malicious RDMA client can send usr_len > off causing
an integer underflow, resulting in data_len wrapping to a huge size_t
value which is then passed to the rdma_ev callback as a memory length,
leading to out-of-bounds memory access.

Fix by reading and validating usr_len <= off before rtrs_srv_get_ops_ids()
in both process_read() and process_write(), ensuring the early return
path acquires no reference and has no resource leak.

## Remediation

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