---
id: CVE-2026-31612
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ksmbd: validate EaNameLength in smb2_get_ea()

  smb2_get_ea() reads ea_req->EaNameLength from the client request and
  passes it directly to strncmp() as the comparison le…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ksmbd: validate EaNameLength in smb2_get_ea()

  smb2_get_ea() reads ea_req->EaNameLength from the client request and
  passes it directly to strncmp() as the comparison le…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 5.15, < 6.6.136'
  - 'linux_kernel >= 6.7, < 6.12.83'
  - 'linux_kernel >= 6.13, < 6.18.24'
  - 'linux_kernel >= 6.19, < 6.19.14'
  - 'linux_kernel >= 7.0, < 7.0.1'
patched:
  - linux_kernel 7.0.1
published: '2026-04-24'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T02:19:12.443'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-31612'
references:
  - url: 'https://git.kernel.org/stable/c/243b206bcb5a7137e8bddd57b2eec81e1ebd3859'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/3363a770b193f555f29d76ddf4ced3305c0ccf6d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/4b73376feecb3b61172fe5b4ff42bbbb8531669d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/551dfb15b182abad4600eaf7b37e6eb7000d5b1b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/66751841212c2cc196577453c37f7774ff363f02'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/859f11e1bc81a4d32bb3ceeae54bcd296ac675d3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/dfc6878d14acafffbe670bf2576620757a10a3d8'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-784472.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
epss: 0.00566
epssPercentile: 0.45662
ingestedAt: '2026-10-15T03:30:12.859Z'
---

## Overview

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

ksmbd: validate EaNameLength in smb2_get_ea()

smb2_get_ea() reads ea_req->EaNameLength from the client request and
passes it directly to strncmp() as the comparison length without
verifying that the length of the name really is the size of the input
buffer received.

Fix this up by properly checking the size of the name based on the value
received and the overall size of the request, to prevent a later
strncmp() call to use the length as a "trusted" size of the buffer.
Without this check, uninitialized heap values might be slowly leaked to
the client.

## Affected

- `linux_kernel >= 5.15, < 6.6.136`
- `linux_kernel >= 6.7, < 6.12.83`
- `linux_kernel >= 6.13, < 6.18.24`
- `linux_kernel >= 6.19, < 6.19.14`
- `linux_kernel >= 7.0, < 7.0.1`

## Remediation

Upgrade past the affected range:

- `linux_kernel 7.0.1`