PatchTheCVECVE-2026-45812: Incorrect Calculation of Buffer Size vulnerability in Apache NimBLE when processing Legacy Advertising Report
CVE-2026-45812 is a medium-severity flaw (CVSS 6.5) affecting nimble. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Incorrect Calculation of Buffer Size vulnerability in Apache NimBLE when processing Legacy Advertising Report HCI event. When a single HCI advertising report event bundles multiple reports, NimBLE miscalculated the offset to the next report. This can cause the host to read past the end of the buffer and deliver a GAP event with bogus data to the application. Severity is low: NimBLE's own controller never batches multiple reports into one event,
Why this priority
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.5 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.7% (top 48%) |
| CISA exploited list | No |
| Weakness | CWE-131 |
| Published | 2026-07-24 |
| Last modified | 2026-10-24 |
Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Exact fixes by distribution
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-45812?
nimble: upgrade to 1.10.0. Exact commands for each OS are on this page.
Is CVE-2026-45812 being exploited?
CVE-2026-45812 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-45812 affect?
CVE-2026-45812 affects nimble. Severity is medium (CVSS 6.5). Incorrect Calculation of Buffer Size vulnerability in Apache NimBLE when processing Legacy Advertising Report HCI event. When a single HCI advertising report event bundles multiple reports, NimBLE miscalculated the offset to the next repor
How urgent is CVE-2026-45812?
Priority 41/100. On your watchlist
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