CVE-2026-45816: nimble Null Dereference — Fix

Description

NULL Pointer Dereference vulnerability in Apache NimBLE in LE Long Term Key Request event. This requires disabled asserts (otherwise assert would trigger before NULL dereference) and bogus (or misbehaving) controller, thus severity is low. This issue affects Apache NimBLE: through 1.9.0. Users are recommended to upgrade to version 1.10.0, which fixes the issue.

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CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS — Exploit Prediction

0.0062

Probability of exploitation

0.46%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-476 CWE-476

Affected Products

Vendor	Product	Versions
apache	nimble	< 1.10.0

References

Advisories & Patches

https://github.com/apache/mynewt-nimble/commit/9448c5f495eb55018121b24a9dab5305c9222ea1 https://lists.apache.org/thread/psppdk5j8jnq1m4jn96tnfofspgqvzvn

Other References

http://www.openwall.com/lists/oss-security/2026/07/24/15

Frequently Asked Questions

What is CVE-2026-45816? +

NULL Pointer Dereference vulnerability in Apache NimBLE in LE Long Term Key Request event. This requires disabled asserts (otherwise assert would trigger before NULL dereference) and bogus (or misbehaving) controller, thus severity is low. This issue affects Apache NimBLE: through 1.9.0. Users are recommended to upgrade to version 1.10.0, which fixes the issue. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-45816? +

CVE-2026-45816 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0062, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-45816? +

CVE-2026-45816 affects products from apache, specifically: nimble. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-45816? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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