UBUNTU-CVE-2025-69209

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Source
https://ubuntu.com/security/CVE-2025-69209
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-69209.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2025-69209
Upstream
Published
2026-01-21T20:16:00Z
Modified
2026-01-30T20:54:09.984174Z
Severity
  • 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

ArduinoCore-avr contains the source code and configuration files of the Arduino AVR Boards platform. A vulnerability in versions prior to 1.8.7 allows an attacker to trigger a stack-based buffer overflow when converting floating-point values to strings with high precision. By passing very large decimalPlaces values to the affected String constructors or concat methods, the dtostrf function writes beyond fixed-size stack buffers, causing memory corruption and denial of service. Under specific conditions, this could enable arbitrary code execution on AVR-based Arduino boards. ### Patches - The Fix is included starting from the 1.8.7 release available from the following link ArduinoCore-avr v1.8.7 - The Fixing Commit is available at the following link 1a6a417f89c8901dad646efce74ae9d3ddebfd59 ### References - ASEC-26-001 ArduinoCore-avr vXXXX Resolves Buffer Overflow Vulnerability ### Credits - Maxime Rossi Bellom and Ramtine Tofighi Shirazi from SecMate (https://secmate.dev/)

References

Affected packages

Ubuntu:22.04:LTS / arduino-core-avr

Package

Name
arduino-core-avr
Purl
pkg:deb/ubuntu/arduino-core-avr@1.8.4+dfsg1-1?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.8.3+dfsg1-1
1.8.4+dfsg1-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "arduino-core-avr",
            "binary_version": "1.8.4+dfsg1-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-69209.json"

Ubuntu:24.04:LTS / arduino-core-avr

Package

Name
arduino-core-avr
Purl
pkg:deb/ubuntu/arduino-core-avr@1.8.6+dfsg-1?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.8.6+dfsg-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "arduino-core-avr",
            "binary_version": "1.8.6+dfsg-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-69209.json"

Ubuntu:25.10 / arduino-core-avr

Package

Name
arduino-core-avr
Purl
pkg:deb/ubuntu/arduino-core-avr@1.8.6+dfsg-1?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.8.6+dfsg-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "arduino-core-avr",
            "binary_version": "1.8.6+dfsg-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-69209.json"