---
id: CVE-2026-90327
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  phonet: pep: do not write beyond optlen in getsockopt

  pep_getsockopt() clamps the reported length to the caller's buffer with
  min_t(), but then stores the value with p…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  phonet: pep: do not write beyond optlen in getsockopt

  pep_getsockopt() clamps the reported length to the caller's buffer with
  min_t(), but then stores the value with p…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 02a47617cdce440f60c71a51f3a93f9f5fcc5a7a <
    6054fed6bad08b6d03973e8ffca7f0c9394d1c30
  - >-
    Linux >= 02a47617cdce440f60c71a51f3a93f9f5fcc5a7a <
    eac733a0b6fe0a52d91f9f623425735ed50ac6c2
  - >-
    Linux >= 02a47617cdce440f60c71a51f3a93f9f5fcc5a7a <
    95e0ed2439dd1792eb454c68ae8d10f30ffe3bff
  - >-
    Linux >= 02a47617cdce440f60c71a51f3a93f9f5fcc5a7a <
    056eea1a2068ad2fb7c3093c5f1095268f87d0c7
  - >-
    Linux >= 02a47617cdce440f60c71a51f3a93f9f5fcc5a7a <
    1bf499e438da80455e258049bce60ffb3a53f3fa
  - >-
    Linux >= 02a47617cdce440f60c71a51f3a93f9f5fcc5a7a <
    c4487e4d5309de587479ecc2f5173b49586f46f4
  - >-
    Linux >= 02a47617cdce440f60c71a51f3a93f9f5fcc5a7a <
    f97022fefe6eb06ee18549d603420440f2959802
  - >-
    Linux >= 02a47617cdce440f60c71a51f3a93f9f5fcc5a7a <
    77e5eb0e192aec6710c03ca8144582fd2af36ca4
  - Linux 2.6.28
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:17:30.800'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90327'
references:
  - url: 'https://git.kernel.org/stable/c/056eea1a2068ad2fb7c3093c5f1095268f87d0c7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/1bf499e438da80455e258049bce60ffb3a53f3fa'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6054fed6bad08b6d03973e8ffca7f0c9394d1c30'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/77e5eb0e192aec6710c03ca8144582fd2af36ca4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/95e0ed2439dd1792eb454c68ae8d10f30ffe3bff'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c4487e4d5309de587479ecc2f5173b49586f46f4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/eac733a0b6fe0a52d91f9f623425735ed50ac6c2'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f97022fefe6eb06ee18549d603420440f2959802'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-17T16:21:47.821Z'
epss: 0.00211
epssPercentile: 0.10042
---

## Overview

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

phonet: pep: do not write beyond optlen in getsockopt

pep_getsockopt() clamps the reported length to the caller's buffer with
min_t(), but then stores the value with put_user(val, (int __user *)
optval), which always writes sizeof(int) bytes. A getsockopt() call with
an optlen smaller than sizeof(int) thus reports the clamped length yet
writes a full int, one to three bytes past the user buffer.

Write the value with copy_to_user() bounded by len, so at most optlen
bytes are copied, matching the length reported back to userspace.

## Remediation

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