Apache NimBLE up to 1.9.0 BASS service integer underflow

Summaryinfo

A vulnerability classified as critical has been found in Apache NimBLE up to 1.9.0. Affected by this vulnerability is an unknown functionality of the component BASS service. Performing a manipulation results in integer underflow. This vulnerability is cataloged as CVE-2026-45813. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as critical, was found in Apache NimBLE up to 1.9.0. This affects some unknown processing of the component BASS service. The manipulation with an unknown input leads to a integer underflow vulnerability. CWE is classifying the issue as CWE-191. The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Out-of-bounds Write, Integer Underflow (Wrap or Wraparound) vulnerability in Apache NimBLE BASS service. Improper validation when parsing BASS service  "Add Source" and "Modify Source" operation PDU could results in stack buffer overflow or arbitrary out-of-bound read. This can be triggered by nearby devices over Bluetooth connection, however pairing is required prior to accessing BASS service, which depending on device configuration may or may not require user action. This issue affects Apache NimBLE: through 1.9.0. Users are recommended to upgrade to version 1.10.0, which fixes the issue.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-45813 since 05/13/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/24/2026).

Upgrading to version 1.10.0 eliminates this vulnerability.

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Productinfo

Vendor

• Apache

Name

• NimBLE

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9.0

License

• open-source

Website

• Vendor: https://www.apache.org/

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