Bluetooth BR/EDR devices with Secure Simple Pairing and Secure Connections pairing in Bluetooth Core Specification 4.2 through 5.4 allow ce…

published 2023-11-28 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-28087

cvss: 6.4; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.3%; EPSS 1.3% chance of exploitation in 30 days, percentile 70%
public exploits: 0; none known

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.

Patch / fix

fixed in 9 distros 6

microsoft windows_10_1809 10.0.17763.5122
microsoft windows_10_21h2 10.0.19043.3693
microsoft windows_10_22h2 10.0.19045.3693
microsoft windows_11_21h2 10.0.22000.2600
microsoft windows_11_22h2 10.0.22621.2715
microsoft windows_11_23h2 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 10.0.25398.531

debian ubuntu red hat suse almalinux rocky linux

linux Debian 12 6.1.76-1
linux Debian 14, Debian 13 6.6.9-1

debian advisories DEBIAN-CVE-2023-24023

linux Ubuntu 20.04 LTS 5.4.0-177.197
linux Ubuntu 22.04 LTS 5.15.0-105.115
linux-aws Ubuntu 20.04 LTS 5.4.0-1123.133
linux-aws Ubuntu 22.04 LTS 5.15.0-1060.66
linux-gcp Ubuntu 20.04 LTS 5.4.0-1127.136
linux-gcp Ubuntu 22.04 LTS 5.15.0-1058.66
linux-gke Ubuntu 22.04 LTS 5.15.0-1057.62
linux-ibm Ubuntu 20.04 LTS 5.4.0-1070.75

ubuntu advisories UBUNTU-CVE-2023-24023

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

kernel RHEL 9 5.14.0-427.13.1.el9_4
rv RHEL 9 5.14.0-427.13.1.el9_4
perf RHEL 9 5.14.0-427.13.1.el9_4
rtla RHEL 9 5.14.0-427.13.1.el9_4
bpftool RHEL 9 7.3.0-427.13.1.el9_4
libperf RHEL 9 5.14.0-427.13.1.el9_4
kernel-rt RHEL 9 5.14.0-427.13.1.el9_4
kernel-64k RHEL 9 5.14.0-427.13.1.el9_4

red hat advisories RHSA-2024:2394 RHSA-2024:2950 RHSA-2024:3138

dtb-aarch64 openSUSE Leap 15.5 5.14.21-150500.55.73.1
kernel-64kb SLE Module for Basesystem 15 SP5, openSUSE Leap 15.5 5.14.21-150500.55.73.1
kernel-syms SLE Module for Development Tools 15 SP5, openSUSE Leap 15.5 5.14.21-150500.55.73.1
kernel-obs-qa openSUSE Leap 15.5 5.14.21-150500.55.73.1
kernel-source SLE Module for Development Tools 15 SP5, SLE Module for Basesystem 15 SP5, openSUSE Leap 15.5 5.14.21-150500.55.73.1
kernel-default SLE Workstation Extension 15 SP5, SLE Module for Legacy 15 SP5, SLE Module for Basesystem 15 SP5 +5 more 5.14.21-150500.55.73.1
kernel-kvmsmall openSUSE Leap 15.5 5.14.21-150500.55.73.1
kernel-zfcpdump SLE Module for Basesystem 15 SP5, openSUSE Leap 15.5 5.14.21-150500.55.73.1

suse advisories SUSE-SU-2024:2939-1 SUSE-SU-2024:2561-1 SUSE-SU-2024:2495-1 SUSE-SU-2024:2394-1 SUSE-SU-2024:2385-1 SUSE-SU-2024:2384-1

kernel-rt AlmaLinux 8 4.18.0-553.rt7.342.el8_10
kernel-rt-kvm AlmaLinux 8 4.18.0-553.rt7.342.el8_10
kernel-rt-core AlmaLinux 8 4.18.0-553.rt7.342.el8_10
kernel-rt-modules AlmaLinux 8 4.18.0-553.rt7.342.el8_10
kernel-rt-debug-kvm AlmaLinux 8 4.18.0-553.rt7.342.el8_10
kernel-rt-debug-core AlmaLinux 8 4.18.0-553.rt7.342.el8_10
kernel-rt-debug-modules AlmaLinux 8 4.18.0-553.rt7.342.el8_10
kernel-rt-modules-extra AlmaLinux 8 4.18.0-553.rt7.342.el8_10

almalinux advisories ALSA-2024:2950 ALSA-2024:3138 ALSA-2024:2394

kernel Rocky Linux 8 4.18.0-553.123.1.el8_10.cloud.0.1
kernel-rt Rocky Linux 8 4.18.0-553.rt7.342.el8_10
kernel Rocky Linux 8 4.18.0-553.el8_10

rocky linux advisories RXSA-2024:3138 RLSA-2024:2950 RLSA-2024:3138

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-24023 updated 2026-11-05 cvss 6.8

kernel: Bluetooth Forward and Future Secrecy Attacks and Defenses

Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more
affected: workaround, no fix planned “Out of support scope”
Red Hat Enterprise Linux 9 kernel-rt, kernel-rt-kvm, kernel-rt-core, kernel-rt-modules, kernel-rt-debug-kvm, kernel-rt-debug-core, +12 more
affected: workaround, no fix available
Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-427.13.1.el9_4, perf 5.14.0-427.13.1.el9_4, rtla 5.14.0-427.13.1.el9_4, kernel-devel-matched 5.14.0-427.13.1.el9_4, kernel-64k-devel-matched 5.14.0-427.13.1.el9_4, kernel-debug-devel-matched 5.14.0-427.13.1.el9_4, +6 more
fixed: vendor fix RHSA-2024:2394
Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.el8_10, kernel 4.18.0-553.el8_10, bpftool 4.18.0-553.el8_10, kernel-core 4.18.0-553.el8_10, kernel-tools 4.18.0-553.el8_10, python3-perf 4.18.0-553.el8_10, +15 more
fixed: vendor fix RHSA-2024:3138
Red Hat Enterprise Linux BaseOS (v. 9) bpftool 7.3.0-427.13.1.el9_4, kernel 5.14.0-427.13.1.el9_4, kernel-64k 5.14.0-427.13.1.el9_4, kernel-core 5.14.0-427.13.1.el9_4, kernel-tools 5.14.0-427.13.1.el9_4, python3-perf 5.14.0-427.13.1.el9_4, +28 more
fixed: vendor fix RHSA-2024:2394
Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.el8_10
fixed: vendor fix RHSA-2024:3138
Red Hat Enterprise Linux CRB (v. 9) libperf 5.14.0-427.13.1.el9_4, kernel-debuginfo-common-s390x 5.14.0-427.13.1.el9_4, kernel-debuginfo-common-x86_64 5.14.0-427.13.1.el9_4, kernel-debuginfo-common-aarch64 5.14.0-427.13.1.el9_4, kernel-debuginfo-common-ppc64le 5.14.0-427.13.1.el9_4
fixed: vendor fix RHSA-2024:2394
Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.rt7.342.el8_10, kernel-rt-kvm 4.18.0-553.rt7.342.el8_10, kernel-rt-core 4.18.0-553.rt7.342.el8_10, kernel-rt-modules 4.18.0-553.rt7.342.el8_10, kernel-rt-debug-kvm 4.18.0-553.rt7.342.el8_10, kernel-rt-debug-core 4.18.0-553.rt7.342.el8_10, +4 more
fixed: vendor fix RHSA-2024:2950

show 3 more

Red Hat Enterprise Linux NFV (v. 9) kernel-rt 5.14.0-427.13.1.el9_4, kernel-rt-kvm 5.14.0-427.13.1.el9_4, kernel-rt-core 5.14.0-427.13.1.el9_4, kernel-rt-modules 5.14.0-427.13.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.13.1.el9_4, kernel-rt-debug-core 5.14.0-427.13.1.el9_4, +6 more
fixed: vendor fix RHSA-2024:2394
Red Hat Enterprise Linux RT (v. 8) kernel-rt 4.18.0-553.rt7.342.el8_10, kernel-rt-core 4.18.0-553.rt7.342.el8_10, kernel-rt-modules 4.18.0-553.rt7.342.el8_10, kernel-rt-debug-core 4.18.0-553.rt7.342.el8_10, kernel-rt-debug-modules 4.18.0-553.rt7.342.el8_10, kernel-rt-modules-extra 4.18.0-553.rt7.342.el8_10, +2 more
fixed: vendor fix RHSA-2024:2950
Red Hat Enterprise Linux RT (v. 9) kernel-rt 5.14.0-427.13.1.el9_4, kernel-rt-core 5.14.0-427.13.1.el9_4, kernel-rt-modules 5.14.0-427.13.1.el9_4, kernel-rt-debug-core 5.14.0-427.13.1.el9_4, kernel-rt-modules-core 5.14.0-427.13.1.el9_4, kernel-rt-debug-modules 5.14.0-427.13.1.el9_4, +4 more
fixed: vendor fix RHSA-2024:2394

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 2 y ago (2024-08-01)

Exploit prediction

1.29% chance of exploitation in the next 30 days, higher than 70% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	6.4	CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
NVD	3.1	6.8	CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CNA	3.1	6.4	CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

Affected products

bluetooth bluetooth_core_specification

References

bluetooth.com /learn-about-bluetooth/key-attributes/bluetooth-security/bluffs-vulnerability/
vendor-advisory
dl.acm.org /doi/10.1145/3576915.3623066
technical-description, third-party-advisory

Sources

CVE List CVE-2023-24023
NVD CVE-2023-24023

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary