Is CVE-2019-9506 being actively exploited?

CVE-2019-9506 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2019-9506?

CVE-2019-9506 has a CVSS 3.1 base score of 8.1 (HIGH).

CVE-2019-9506

HIGH · CVSS 8.1EPSS 2.7%EU EUVD

The Bluetooth BR/EDR specification up to and including version 5.1 permits sufficiently low encryption key length and does not prevent an attacker from influencing the key length negotiation. This allows practical brute-force attacks (aka "KNOB") that can decrypt traffic and inject arbitrary ciphertext without the victim noticing.

Key facts

CVSS score: 8.1 (v3.1)
Severity: HIGH
CVSS vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness (CWE): CWE-310
EPSS score: 2.7% (86th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2019-18880)
Published: August 14, 2019
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2019-18880 in the EU Vulnerability Database. Last updated in EUVD on September 16, 2024.

View on the EU Vulnerability Database

Affected products

apple / iphone os
apple / mac os x
apple / mac os x
apple / mac os x
apple / tvos
apple / watchos
blackberry / blackberry
canonical / ubuntu linux
canonical / ubuntu linux
canonical / ubuntu linux
debian / debian linux
google / android
huawei / alp-al00b
huawei / alp-al00b firmware
huawei / ares-al00b
huawei / ares-al00b firmware
huawei / ares-al10d
huawei / ares-al10d firmware
huawei / ares-tl00c
huawei / ares-tl00c firmware
huawei / asoka-al00ax
huawei / asoka-al00ax firmware
huawei / atomu-l33
huawei / atomu-l33 firmware
huawei / atomu-l41
huawei / atomu-l41 firmware
huawei / atomu-l42
huawei / atomu-l42 firmware
huawei / barca-al00
huawei / barca-al00 firmware
huawei / berkeley-al20
huawei / berkeley-al20 firmware
huawei / berkeley-l09
huawei / berkeley-l09 firmware
huawei / berkeley-tl10
huawei / berkeley-tl10 firmware
huawei / bla-al00b
huawei / bla-al00b firmware
huawei / bla-l29c
huawei / bla-l29c firmware
huawei / bla-tl00b
huawei / bla-tl00b firmware
huawei / cairogo-l22
huawei / cairogo-l22 firmware
huawei / charlotte-l29c
huawei / charlotte-l29c firmware
huawei / columbia-al10b
huawei / columbia-al10b firmware
huawei / columbia-al10i
huawei / columbia-al10i firmware

and 249 more…

Certified products that may be affected

26 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Red Hat Enterprise Linux 8 NSS Cryptographic Module - Red Hat, Inc. - FIPS 140 5513 - active
Red Hat Enterprise Linux 8 Kernel Cryptographic API - Red Hat, LLC - FIPS 140 5461 - active
Red Hat Enterprise Linux 8 Kernel Cryptographic API - Red Hat, Inc. - FIPS 140 5089 - active
Red Hat Enterprise Linux 8 OpenSSL Cryptographic Module - Red Hat®, Inc. - FIPS 140 4642 - historical
Red Hat Enterprise Linux 8 NSS Cryptographic Module - Red Hat®, Inc. - FIPS 140 4458 - historical

See all 26 in the Security Certifications Explorer.

References

http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00036.html(Mailing List, Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00037.html(Mailing List, Third Party Advisory)
http://seclists.org/fulldisclosure/2019/Aug/11(Mailing List, Third Party Advisory)
http://seclists.org/fulldisclosure/2019/Aug/13(Mailing List, Third Party Advisory)
http://seclists.org/fulldisclosure/2019/Aug/14(Mailing List, Third Party Advisory)
http://seclists.org/fulldisclosure/2019/Aug/15(Mailing List, Third Party Advisory)
http://www.cs.ox.ac.uk/publications/publication12404-abstract.html(Third Party Advisory)
http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20190828-01-knob-en(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2019:2975(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2019:3055(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2019:3076(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2019:3089(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2019:3165(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2019:3187(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2019:3217(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2019:3218(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2019:3220(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2019:3231(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2019:3309(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2019:3517(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2020:0204(Third Party Advisory)
https://lists.debian.org/debian-lts-announce/2019/09/msg00014.html(Mailing List, Third Party Advisory)
https://lists.debian.org/debian-lts-announce/2019/09/msg00015.html(Mailing List, Third Party Advisory)
https://lists.debian.org/debian-lts-announce/2019/09/msg00025.html(Mailing List, Third Party Advisory)
https://usn.ubuntu.com/4115-1/(Third Party Advisory)
https://usn.ubuntu.com/4118-1/(Third Party Advisory)
https://usn.ubuntu.com/4147-1/(Third Party Advisory)
https://www.bluetooth.com/security/statement-key-negotiation-of-bluetooth/(Third Party Advisory)
https://www.kb.cert.org/vuls/id/918987/(Third Party Advisory, US Government Resource)
https://www.usenix.org/conference/usenixsecurity19/presentation/antonioli(Third Party Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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