zephyrproject-rtos Zephyr up to 4.3 socketcan_frame out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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5.7$0-$5k0.00

Summaryinfo

A vulnerability was found in zephyrproject-rtos Zephyr up to 4.3 and classified as problematic. This impacts the function socketcan_frame. Executing a manipulation can lead to out-of-bounds. This vulnerability is registered as CVE-2026-5071. The attack needs to be launched locally. No exploit is available.

Detailsinfo

A vulnerability has been found in zephyrproject-rtos Zephyr up to 4.3 and classified as problematic. This vulnerability affects the function socketcan_frame. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality. CVE summarizes:

The SocketCAN implementation validates the length of a user-provided buffer containing a socketcan_frame object using only a NET_ASSERT statement in zcan_sendto_ctx() before dereferencing it in socketcan_to_can_frame(). In production builds where assertions are disabled, a userspace application that controls the length passed to a sendto syscall can supply an incomplete or truncated frame, causing socketcan_to_can_frame() to dereference fields beyond the end of the buffer. This results in an out-of-bounds read that can cause denial-of-service crashes or, because the parsed frame contents are transmitted on the network, leak adjacent memory.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-5071 since 03/28/2026. The exploitation appears to be easy. The attack needs to be approached locally. There are known technical details, but no exploit is available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-33449). Once again VulDB remains the best source for vulnerability data.

Productinfo

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Vendor

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.7

VulDB Base Score: 3.3
VulDB Temp Score: 3.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔒

CNA Base Score: 6.1
CNA Vector (zephyr): 🔒

CVSSv2info

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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: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

03/28/2026 CVE reserved
05/30/2026 +62 days Advisory disclosed
05/30/2026 +0 days VulDB entry created
07/08/2026 +39 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-c3w6-x7m3-3c58
Status: Confirmed

CVE: CVE-2026-5071 (🔒)
GCVE (CVE): GCVE-0-2026-5071
GCVE (VulDB): GCVE-100-367420
EUVD: 🔒

Entryinfo

Created: 05/30/2026 11:31
Updated: 07/08/2026 15:55
Changes: 05/30/2026 11:31 (64), 05/30/2026 12:56 (1), 07/08/2026 15:55 (11)
Complete: 🔍
Cache ID: 216::103

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