Linux Kernel up to 6.16.9 PC CAN FD Interface out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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3.4$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.16.9. It has been classified as critical. The affected element is an unknown function of the component PC CAN FD Interface. Performing a manipulation results in out-of-bounds. This vulnerability is known as CVE-2025-40020. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.16.9. It has been classified as problematic. This affects an unknown code block of the component PC CAN FD Interface. The manipulation with an unknown input leads to a out-of-bounds vulnerability. CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: can: peak_usb: fix shift-out-of-bounds issue Explicitly uses a 64-bit constant when the number of bits used for its shifting is 32 (which is the case for PC CAN FD interfaces supported by this driver). [mkl: update subject, apply manually]

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2025-40020 since 04/16/2025. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 274816 (Debian dsa-6053 : affs-modules-6.1.0-37-4kc-malta-di - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.4.300, 5.10.245, 5.15.194, 6.1.155, 6.6.109, 6.12.50 or 6.16.10 eliminates this vulnerability. Applying the patch 572c656802781cc57f4a3231eefa83547e75ed78/61b1dd4c614935169d12bdecc26906e37b508618/48822a59ecc47d353400d38b1941d3ae7591ffff/176c81cbf9c4e348610a421aad800087c0401f60/17edec1830e48c0becd61642d0e40bc753243b16/eb79ed970670344380e77d62f8188e8015648d94/394c58017e5f41043584c345106cae16a4613710/c443be70aaee42c2d1d251e0329e0a69dd96ae54 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (274816) and CERT Bund (WID-SEC-2025-2407). Be aware that VulDB is the high quality source for vulnerability data.

Affected

  • Debian Linux
  • Google Cloud Platform
  • Amazon Linux 2
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • Open Source Linux Kernel
  • Dell NetWorker

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.5
VulDB Meta Temp Score: 3.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 274816
Nessus Name: Debian dsa-6053 : affs-modules-6.1.0-37-4kc-malta-di - security update

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.4.300/5.10.245/5.15.194/6.1.155/6.6.109/6.12.50/6.16.10
Patch: 572c656802781cc57f4a3231eefa83547e75ed78/61b1dd4c614935169d12bdecc26906e37b508618/48822a59ecc47d353400d38b1941d3ae7591ffff/176c81cbf9c4e348610a421aad800087c0401f60/17edec1830e48c0becd61642d0e40bc753243b16/eb79ed970670344380e77d62f8188e8015648d94/394c58017e5f41043584c345106cae16a4613710/c443be70aaee42c2d1d251e0329e0a69dd96ae54

Timelineinfo

04/16/2025 CVE reserved
10/24/2025 +191 days Advisory disclosed
10/24/2025 +0 days VulDB entry created
02/02/2026 +101 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-40020 (🔒)
GCVE (CVE): GCVE-0-2025-40020
GCVE (VulDB): GCVE-100-329775
CERT Bund: WID-SEC-2025-2407 - Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service

Entryinfo

Created: 10/24/2025 15:28
Updated: 02/02/2026 10:43
Changes: 10/24/2025 15:28 (58), 10/28/2025 09:54 (7), 11/12/2025 08:28 (2), 12/09/2025 10:18 (1), 02/02/2026 10:43 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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