---
id: CVE-2026-74394
title: 'RDMA/srpt: fix integer overflow in immediate data length check'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  RDMA/srpt: fix integer overflow in immediate data length check

  imm_buf->len is a user-controlled uint32_t received from the network.
  Adding it to imm_data_offset witho…
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'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 5dabcd0456d7ee17c2c7a17d7c2305444d2b9639 <
    c82c860f8c8e4f4f454c9f14d0ad0c0466965f7d
  - >-
    Linux >= 5dabcd0456d7ee17c2c7a17d7c2305444d2b9639 <
    3efa5301137140a3ca3677a9098c0a93a0acfd49
  - >-
    Linux >= 5dabcd0456d7ee17c2c7a17d7c2305444d2b9639 <
    067b9556eeb007f28b7c2033b4dcde5b6d88418f
  - >-
    Linux >= 5dabcd0456d7ee17c2c7a17d7c2305444d2b9639 <
    dcf7a986f377cce0749ed53f1d64195fbd5fdf91
  - >-
    Linux >= 5dabcd0456d7ee17c2c7a17d7c2305444d2b9639 <
    07dec3f6dcb6c6cc891162d252b800eb0e6d5e8e
  - >-
    Linux >= 5dabcd0456d7ee17c2c7a17d7c2305444d2b9639 <
    65572fbd86033ae2370125593d59b8be34253aaf
  - >-
    Linux >= 5dabcd0456d7ee17c2c7a17d7c2305444d2b9639 <
    72497172a4799119a0282a5eb5e2b8ddcc821921
  - >-
    Linux >= 5dabcd0456d7ee17c2c7a17d7c2305444d2b9639 <
    eb4ecdf631fe00e8020bf461503cb9b7017ed796
  - Linux 5.0
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-10-16T18:55:19.237271Z'
published: '2026-08-15'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T19:05:40.869Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-74394'
references:
  - url: 'https://git.kernel.org/stable/c/c82c860f8c8e4f4f454c9f14d0ad0c0466965f7d'
  - url: 'https://git.kernel.org/stable/c/3efa5301137140a3ca3677a9098c0a93a0acfd49'
  - url: 'https://git.kernel.org/stable/c/067b9556eeb007f28b7c2033b4dcde5b6d88418f'
  - url: 'https://git.kernel.org/stable/c/dcf7a986f377cce0749ed53f1d64195fbd5fdf91'
  - url: 'https://git.kernel.org/stable/c/07dec3f6dcb6c6cc891162d252b800eb0e6d5e8e'
  - url: 'https://git.kernel.org/stable/c/65572fbd86033ae2370125593d59b8be34253aaf'
  - url: 'https://git.kernel.org/stable/c/72497172a4799119a0282a5eb5e2b8ddcc821921'
  - url: 'https://git.kernel.org/stable/c/eb4ecdf631fe00e8020bf461503cb9b7017ed796'
tags:
  - cve.org
epss: 0.0054
epssPercentile: 0.44177
ingestedAt: '2026-10-16T19:46:24.369Z'
---

## Overview

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

RDMA/srpt: fix integer overflow in immediate data length check

imm_buf->len is a user-controlled uint32_t received from the network.
Adding it to imm_data_offset without overflow checking allows a
malicious initiator to send len=0xFFFFFFFF, causing req_size to wrap
around to a small value, bypassing the bounds check, and subsequently
passing a ~4GB length to sg_init_one().

Use check_add_overflow() to detect wrapping before the comparison.

## Affected

- `Linux >= 5dabcd0456d7ee17c2c7a17d7c2305444d2b9639 < c82c860f8c8e4f4f454c9f14d0ad0c0466965f7d`
- `Linux >= 5dabcd0456d7ee17c2c7a17d7c2305444d2b9639 < 3efa5301137140a3ca3677a9098c0a93a0acfd49`
- `Linux >= 5dabcd0456d7ee17c2c7a17d7c2305444d2b9639 < 067b9556eeb007f28b7c2033b4dcde5b6d88418f`
- `Linux >= 5dabcd0456d7ee17c2c7a17d7c2305444d2b9639 < dcf7a986f377cce0749ed53f1d64195fbd5fdf91`
- `Linux >= 5dabcd0456d7ee17c2c7a17d7c2305444d2b9639 < 07dec3f6dcb6c6cc891162d252b800eb0e6d5e8e`
- `Linux >= 5dabcd0456d7ee17c2c7a17d7c2305444d2b9639 < 65572fbd86033ae2370125593d59b8be34253aaf`
- `Linux >= 5dabcd0456d7ee17c2c7a17d7c2305444d2b9639 < 72497172a4799119a0282a5eb5e2b8ddcc821921`
- `Linux >= 5dabcd0456d7ee17c2c7a17d7c2305444d2b9639 < eb4ecdf631fe00e8020bf461503cb9b7017ed796`
- `Linux 5.0`

## Remediation

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