What’s Vulnerable › Vulnerabilities

CVE-2025-53470: Apache Mynewt NimBLE: Out-of-Bounds Write Vulnerability in NimBLE HCI H4 driver

• Severity: low (CVSS 3.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-10 · updated 2026-06-17
• Weakness: CWE-125

Description

Out-of-bounds Read vulnerability in Apache NimBLE HCI H4 driver. Specially crafted HCI event could lead to invalid memory read in H4 driver. This issue affects Apache NimBLE: through 1.8.  This issue requires a broken or bogus Bluetooth controller and thus severity is considered low. Users are recommended to upgrade to version 1.9, which fixes the issue.

Affected products

• Apache Software Foundation Apache NimBLE: before 1.9.0 — fixed in 1.9.0

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache NimBLE 1.9.0. Check the vendor advisory for mitigations.

References

• https://github.com/apache/mynewt-nimble/commit/b973df0c6cf7b30efbf8eb2cafdc1ee843464b76
• https://lists.apache.org/thread/32sm0944dyod4sdql77stgyw9xb2msc0
• http://www.openwall.com/lists/oss-security/2026/01/08/2

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