High 8.1Published Aug 14, 2019

CVE-2019-9506The 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.

Updated under an hour ago (Nov 2, 2026, 12:10 AM ET)

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It affects google android and 59 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Start free and add your stackFree account, 3 products Every CVE for google android Exploited in the last 30 days

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.

CVSS: 8.1 HIGH (v3.1, NVD)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness (CWE): CWE-310, CWE-327
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 16, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

google android google:android	all versions	NVD
apple iphone_os apple:iphone_os	12.4	NVD
apple mac_os_x apple:mac_os_x	10.12.6; 10.13.6; 10.14.5	NVD
apple tvos apple:tvos	12.4	NVD
apple watchos apple:watchos	5.3	NVD
canonical ubuntu_linux canonical:ubuntu_linux	16.04; 18.04; 19.04	NVD
debian debian_linux debian:debian_linux	8.0	NVD
opensuse leap opensuse:leap	15.0; 15.1	NVD
redhat mrg_realtime redhat:mrg_realtime	2.0	NVD
redhat virtualization_host_eus redhat:virtualization_host_eus	4.2	NVD
1–10 of 60

References

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
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.