---
id: CVE-2026-80707
title: 'can: j1939: transport: j1939_session_fresh_new(): initialize receive buffer'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  can: j1939: transport: j1939_session_fresh_new(): initialize receive buffer

  Zero the allocated buffer in j1939_session_fresh_new() to ensure it
  contains no residual da…
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'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 9d71dd0c70099914fcd063135da3c580865e924c <
    348818277a3646d5b9fa60c9d20c00dc4bc86832
  - >-
    Linux >= 9d71dd0c70099914fcd063135da3c580865e924c <
    f3e120a34b336079479fa10f706f0636eaa6e751
  - >-
    Linux >= 9d71dd0c70099914fcd063135da3c580865e924c <
    bbfa49d1e287de44994955b44d19281be3195b44
  - >-
    Linux >= 9d71dd0c70099914fcd063135da3c580865e924c <
    194d67e92197eb820f4c2c6605d9721333b3eba0
  - >-
    Linux >= 9d71dd0c70099914fcd063135da3c580865e924c <
    038bad8e16c2e28acf31f0b527a816fb23a57269
  - >-
    Linux >= 9d71dd0c70099914fcd063135da3c580865e924c <
    8604a3b81b9d0ceaf04fee5f52e701f623a179f9
  - >-
    Linux >= 9d71dd0c70099914fcd063135da3c580865e924c <
    d5b3613c7d69d8dcb4dd6704f1f463198ce9f6cf
  - >-
    Linux >= 9d71dd0c70099914fcd063135da3c580865e924c <
    eb96c58907922546e415e545fe9a14ea63b02719
  - Linux 5.4
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-16T19:20:28.838708Z'
published: '2026-08-28'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T19:26:34.357Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-80707'
references:
  - url: 'https://git.kernel.org/stable/c/348818277a3646d5b9fa60c9d20c00dc4bc86832'
  - url: 'https://git.kernel.org/stable/c/f3e120a34b336079479fa10f706f0636eaa6e751'
  - url: 'https://git.kernel.org/stable/c/bbfa49d1e287de44994955b44d19281be3195b44'
  - url: 'https://git.kernel.org/stable/c/194d67e92197eb820f4c2c6605d9721333b3eba0'
  - url: 'https://git.kernel.org/stable/c/038bad8e16c2e28acf31f0b527a816fb23a57269'
  - url: 'https://git.kernel.org/stable/c/8604a3b81b9d0ceaf04fee5f52e701f623a179f9'
  - url: 'https://git.kernel.org/stable/c/d5b3613c7d69d8dcb4dd6704f1f463198ce9f6cf'
  - url: 'https://git.kernel.org/stable/c/eb96c58907922546e415e545fe9a14ea63b02719'
tags:
  - cve.org
epss: 0.00329
epssPercentile: 0.24447
ingestedAt: '2026-10-16T19:46:24.305Z'
---

## Overview

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

can: j1939: transport: j1939_session_fresh_new(): initialize receive buffer

Zero the allocated buffer in j1939_session_fresh_new() to ensure it
contains no residual data.

While there is a potential performance impact if users allocate maximum
sized ETP buffers, most real-world use cases are not noticeably affected
since the maximum known buffer size is typically around 65K.

[mkl: add Message-ID]

## Affected

- `Linux >= 9d71dd0c70099914fcd063135da3c580865e924c < 348818277a3646d5b9fa60c9d20c00dc4bc86832`
- `Linux >= 9d71dd0c70099914fcd063135da3c580865e924c < f3e120a34b336079479fa10f706f0636eaa6e751`
- `Linux >= 9d71dd0c70099914fcd063135da3c580865e924c < bbfa49d1e287de44994955b44d19281be3195b44`
- `Linux >= 9d71dd0c70099914fcd063135da3c580865e924c < 194d67e92197eb820f4c2c6605d9721333b3eba0`
- `Linux >= 9d71dd0c70099914fcd063135da3c580865e924c < 038bad8e16c2e28acf31f0b527a816fb23a57269`
- `Linux >= 9d71dd0c70099914fcd063135da3c580865e924c < 8604a3b81b9d0ceaf04fee5f52e701f623a179f9`
- `Linux >= 9d71dd0c70099914fcd063135da3c580865e924c < d5b3613c7d69d8dcb4dd6704f1f463198ce9f6cf`
- `Linux >= 9d71dd0c70099914fcd063135da3c580865e924c < eb96c58907922546e415e545fe9a14ea63b02719`
- `Linux 5.4`

## Remediation

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