CVE-2023-24023

Severity: medium (CVSS 6.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-11-28 · updated 2026-06-17

Description

Bluetooth BR/EDR devices with Secure Simple Pairing and Secure Connections pairing in Bluetooth Core Specification 4.2 through 5.4 allow certain man-in-the-middle attacks that force a short key length, and might lead to discovery of the encryption key and live injection, aka BLUFFS.

Affected products

Bluetooth Core Specification: from 4.2 through 5.4
Microsoft Windows 10: before 10.0.17763.5122 — fixed in 10.0.17763.5122
Microsoft Windows 10: before 10.0.19043.3693 — fixed in 10.0.19043.3693
Microsoft Windows 10: before 10.0.19045.3693 — fixed in 10.0.19045.3693
Microsoft Windows 11 21H2: before 10.0.22000.2600 — fixed in 10.0.22000.2600
Microsoft Windows 11: before 10.0.22621.2715 — fixed in 10.0.22621.2715
Microsoft Windows 11: before 10.0.22631.2715 — fixed in 10.0.22631.2715
Microsoft Windows Server 2019: before 10.0.17763.5122 — fixed in 10.0.17763.5122
Microsoft Windows Server 2022: before 10.0.20348.2113 — fixed in 10.0.20348.2113
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): before 10.0.25398.531 — fixed in 10.0.25398.531
Bluetooth Core Specification: from 4.2 through 5.4

How to fix

Upgrade to a fixed version: Microsoft Windows 10 10.0.17763.5122; Microsoft Windows 10 10.0.19043.3693; Microsoft Windows 10 10.0.19045.3693; Microsoft Windows 11 21H2 10.0.22000.2600; Microsoft Windows 11 10.0.22621.2715; Microsoft Windows 11 10.0.22631.2715; Microsoft Windows Server 2019 10.0.17763.5122; Microsoft Windows Server 2022 10.0.20348.2113; Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.531. Check the vendor advisory for mitigations.

References

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