libcsp 2.0 drivers/usart/zephyr.c csp_usart_open buffer overflow

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.
5.3$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in libcsp 2.0. Affected by this issue is the function csp_usart_open of the file drivers/usart/zephyr.c. Executing a manipulation can lead to buffer overflow. The identification of this vulnerability is CVE-2025-51824. There is no exploit available. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability classified as critical was found in libcsp 2.0. This vulnerability affects the function csp_usart_open of the file drivers/usart/zephyr.c. The manipulation with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

libcsp 2.0 is vulnerable to Buffer Overflow in the csp_usart_open() function at drivers/usart/zephyr.c.

The advisory is available at github.com. This vulnerability was named CVE-2025-51824 since 06/16/2025. The exploitation appears to be easy. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 259920 (Linux Distros Unpatched Vulnerability : CVE-2025-51824), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the vulnerability database at Tenable (259920). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

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

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 259920
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-51824

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: github.com

Timelineinfo

06/16/2025 CVE reserved
08/11/2025 +56 days Advisory disclosed
08/11/2025 +0 days VulDB entry created
08/31/2025 +20 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 851
Status: Confirmed

CVE: CVE-2025-51824 (🔒)
GCVE (CVE): GCVE-0-2025-51824
GCVE (VulDB): GCVE-100-319474

Entryinfo

Created: 08/11/2025 21:57
Updated: 08/31/2025 17:23
Changes: 08/11/2025 21:57 (56), 08/14/2025 20:20 (1), 08/31/2025 17:23 (2)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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!