Incorrect Calculation of Buffer Size vulnerability in Apache NimBLE when processing Legacy Advertising Report HCI event. (CVE-2026-45812)
Apache NimBLE versions prior to 1.10.0 have a buffer size miscalculation vulnerability when processing Legacy Advertising Report HCI events that include multiple reports. This flaw causes the host to read beyond the buffer boundary, resulting in corrupted GAP events delivered to the application. The vulnerability is considered low severity in typical use because NimBLE's own controller does not batch multiple reports, so the issue only arises when used with third-party controllers that do. The vulnerability is fixed in version 1.10.0.
AI Analysis
Technical Summary
CVE-2026-45812 is a buffer size miscalculation vulnerability in Apache NimBLE before version 1.10.0. It occurs during processing of Legacy Advertising Report HCI events that bundle multiple reports, causing out-of-bounds reads and corrupted GAP events. NimBLE's default controller does not trigger this issue, limiting its impact to environments using third-party controllers that batch reports. The vulnerability is addressed in NimBLE 1.10.0.
Potential Impact
The vulnerability leads to reading beyond the buffer boundary, which results in corrupted GAP events being delivered to the application. This can cause data integrity issues in Bluetooth communication. The impact is limited because NimBLE's own controller does not batch multiple reports, so typical deployments are not affected. No known exploits are reported in the wild.
Mitigation Recommendations
Upgrade Apache NimBLE to version 1.10.0 or later, where this buffer size miscalculation vulnerability is fixed. No other mitigations are indicated.
Incorrect Calculation of Buffer Size vulnerability in Apache NimBLE when processing Legacy Advertising Report HCI event. (CVE-2026-45812)
Description
Apache NimBLE versions prior to 1.10.0 have a buffer size miscalculation vulnerability when processing Legacy Advertising Report HCI events that include multiple reports. This flaw causes the host to read beyond the buffer boundary, resulting in corrupted GAP events delivered to the application. The vulnerability is considered low severity in typical use because NimBLE's own controller does not batch multiple reports, so the issue only arises when used with third-party controllers that do. The vulnerability is fixed in version 1.10.0.
CVSS v3.1
Affected software
pkg:github/apache/mynewt-nimbleRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-45812 is a buffer size miscalculation vulnerability in Apache NimBLE before version 1.10.0. It occurs during processing of Legacy Advertising Report HCI events that bundle multiple reports, causing out-of-bounds reads and corrupted GAP events. NimBLE's default controller does not trigger this issue, limiting its impact to environments using third-party controllers that batch reports. The vulnerability is addressed in NimBLE 1.10.0.
Potential Impact
The vulnerability leads to reading beyond the buffer boundary, which results in corrupted GAP events being delivered to the application. This can cause data integrity issues in Bluetooth communication. The impact is limited because NimBLE's own controller does not batch multiple reports, so typical deployments are not affected. No known exploits are reported in the wild.
Mitigation Recommendations
Upgrade Apache NimBLE to version 1.10.0 or later, where this buffer size miscalculation vulnerability is fixed. No other mitigations are indicated.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-m9xh-wpcw-qvx9
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-45812"]
- Ecosystems
- []
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
Threat ID: 6a65422b9c2644c7f808a29e
Added to database: 07/25/2026, 23:09:31 UTC
Last enriched: 07/26/2026, 00:22:58 UTC
Last updated: 07/26/2026, 02:51:53 UTC
Views: 5
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