CVE-2025-53470

low-risk

Published 2026-01-10

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.

Do I need to act?

0.02% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 3.1/10 Low

ADJACENT_NETWORK / HIGH complexity

Affected Products (1)

Nimble

Affected Vendors

Apache

References (3)

Patch https://github.com/apache/mynewt-nimble/commit/b973df0c6cf7b30efbf8eb2cafdc1ee84...

Mailing List https://lists.apache.org/thread/32sm0944dyod4sdql77stgyw9xb2msc0

Mailing List http://www.openwall.com/lists/oss-security/2026/01/08/2

/ 100

low-risk

Severity 8/34 · Low

Exploitability 0/34 · Minimal

Exposure 5/34 · Minimal