Medium severity · published Jul 24, 2026
CVE-2026-45812
Apache NimBLE: OOB Read via sizeof(pointer) in Legacy Advertising Report Handler
6.5
CVSS
0.7%
EPSS
No
On KEV
Description
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, so this only matters when NimBLE's host is paired with a third-party controller that does.
This issue affects Apache NimBLE: through 1.9.0.
Users are recommended to upgrade to version 1.10.0, which fixes the issue.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 53% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AN
Apache NimBLE · Apache Software Foundation
through 1.9.0 · source: vendor
NI
Nimble · Apache
before 1.10.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-45812
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-45812
Patch
https://github.com/apache/mynewt-nimble/commit/605c7585408bc3674818eeb7b6f478a8aefe9746
Mailing List
https://lists.apache.org/thread/rll5m1ly2vg8jr76lp5ohrtspr5vlofy
Mailing List
http://www.openwall.com/lists/oss-security/2026/07/24/12
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