Linux Kernel up to 7.1.7 j1939 j1939_session_fresh_new initialization

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.1$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 7.1.7. It has been declared as problematic. This affects the function j1939_session_fresh_new of the component j1939. Executing a manipulation can lead to initialization. This vulnerability is registered as CVE-2026-80707. It is possible to launch the attack remotely. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in Linux Kernel up to 7.1.7. This vulnerability affects the function j1939_session_fresh_new of the component j1939. The manipulation with an unknown input leads to a initialization vulnerability. The CWE definition for the vulnerability is CWE-665. The product does not initialize or incorrectly initializes a resource, which might leave the resource in an unexpected state when it is accessed or used. As an impact it is known to affect confidentiality. CVE summarizes:

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]

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2026-80707 since 08/26/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 08/30/2026).

Upgrading to version 5.10.265, 5.15.216, 6.1.183, 6.6.151, 6.12.103, 6.18.44 or 7.1.8 eliminates this vulnerability. Applying the patch 348818277a3646d5b9fa60c9d20c00dc4bc86832/f3e120a34b336079479fa10f706f0636eaa6e751/bbfa49d1e287de44994955b44d19281be3195b44/194d67e92197eb820f4c2c6605d9721333b3eba0/038bad8e16c2e28acf31f0b527a816fb23a57269/8604a3b81b9d0ceaf04fee5f52e701f623a179f9/d5b3613c7d69d8dcb4dd6704f1f463198ce9f6cf/eb96c58907922546e415e545fe9a14ea63b02719 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at EUVD (EUVD-2026-67442) and CERT Bund (WID-SEC-2026-3075). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • Open Source Linux Kernel

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Initialization
CWE: CWE-665
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.10.265/5.15.216/6.1.183/6.6.151/6.12.103/6.18.44/7.1.8
Patch: 348818277a3646d5b9fa60c9d20c00dc4bc86832/f3e120a34b336079479fa10f706f0636eaa6e751/bbfa49d1e287de44994955b44d19281be3195b44/194d67e92197eb820f4c2c6605d9721333b3eba0/038bad8e16c2e28acf31f0b527a816fb23a57269/8604a3b81b9d0ceaf04fee5f52e701f623a179f9/d5b3613c7d69d8dcb4dd6704f1f463198ce9f6cf/eb96c58907922546e415e545fe9a14ea63b02719

Timelineinfo

08/26/2026 CVE reserved
08/28/2026 +2 days Advisory disclosed
08/28/2026 +0 days VulDB entry created
08/30/2026 +2 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-80707 (🔒)
GCVE (CVE): GCVE-0-2026-80707
GCVE (VulDB): GCVE-100-396640
EUVD: 🔒
CERT Bund: WID-SEC-2026-3075 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 08/28/2026 11:00
Updated: 08/30/2026 05:52
Changes: 08/28/2026 11:00 (59), 08/29/2026 12:53 (1), 08/30/2026 05:52 (7)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you want to use VulDB in your project?

Use the official API to access entries easily!