SimpleBLE up to 0.13.x Dongl Backend simpleble_write stack-based overflow

Summaryinfo

A vulnerability has been found in SimpleBLE up to 0.13.x and classified as critical. Impacted is the function Protocol::simpleble_write of the component Dongl Backend. Performing a manipulation results in stack-based overflow. This vulnerability was named CVE-2026-44634. The attack may be initiated remotely. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in SimpleBLE up to 0.13.x. It has been classified as critical. This affects the function Protocol::simpleble_write of the component Dongl Backend. The manipulation with an unknown input leads to a stack-based overflow vulnerability. CWE is classifying the issue as CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). This is going to have an impact on availability. The summary by CVE is:

SimpleBLE is a cross-platform library and bindings for Bluetooth Low Energy (BLE). Prior to version 0.14.0, there are multiple stack-based buffer overflow vulnerabilities in SimpleBLE. There is a stack overflow vulnerability in the dongl backend’s Protocol::simpleble_write function (local, caller-controlled input). A stack overflow vulnerability when processing manufacturer-specific data in BLE advertisements (remote, no pairing or connection required). Lastly, a stack overflow vulnerability when processing service data in BLE advertisements (remote, no pairing or connection required). This issue has been patched in version 0.14.0.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-44634 since 05/07/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 0.14.0 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 1501d59d76a4280268372afb1b157bf6caeacba6 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Name

• SimpleBLE

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13

License

• open-source

Website

• Product: https://github.com/simpleble/simpleble/

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