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Fencer Vulns
high 7.6

CVE-2019-9506 json

Blutooth BR/EDR specification does not specify sufficient encryption key length and allows an attacker to influence key length negotiation

published 2019-08-14 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-18880

cvss
7.6
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.7%
EPSS 2.7% chance of exploitation in 30 days, percentile 85%
public exploits
0
none known

Summary

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.

Patch / fix

  • huawei alp-al00b_firmware 9.1.0.333\(c00e333r2p1t8\)
  • huawei ares-al00b_firmware 9.1.0.160\(c00e160r2p5t8\)
  • huawei ares-al10d_firmware 9.1.0.160\(c00e160r2p5t8\)
  • huawei ares-tl00c_firmware 9.1.0.165\(c01e165r2p5t8\)
  • huawei asoka-al00ax_firmware 9.1.1.181\(c00e48r6p1\)
  • huawei atomu-l33_firmware 8.0.0.147\(c605custc605d1\)
  • huawei atomu-l41_firmware 8.0.0.153\(c461custc461d1\)
  • huawei atomu-l42_firmware 8.0.0.155\(c636custc636d1\)
  • huawei bla-al00b_firmware 9.1.0.329\(c786e320r2p1t8\)
  • huawei bla-l29c_firmware 9.1.0.300\(c605e2r1p12t8\), 9.1.0.306\(c185e2r1p13t8\), 9.1.0.306\(c432e4r1p11t8\), 9.1.0.306\(c636e2r1p13t8\), 9.1.0.307\(c635e4r1p13t8\)
  • huawei bla-tl00b_firmware 9.1.0.329\(c01e320r1p1t8\)
  • huawei barca-al00_firmware 8.0.0.366\(c00\)
  • huawei berkeley-al20_firmware 9.1.0.333\(c00e333r2p1t8\)
  • huawei berkeley-l09_firmware 9.1.0.332\(c432e5r1p13t8\), 9.1.0.350\(c10e3r1p14t8\), 9.1.0.350\(c636e4r1p13t8\)
  • huawei berkeley-tl10_firmware 9.1.0.333\(c01e333r1p1t8\)
  • huawei cairogo-l22_firmware cairogo-l22c461b153
  • huawei charlotte-l29c_firmware 9.1.0.311\(c605e2r1p11t8\), 9.1.0.325\(c185e4r1p11t8\), 9.1.0.325\(c636e2r1p12t8\), 9.1.0.328\(c432e5r1p9t8\), 9.1.0.328\(c782e10r1p9t8\)
  • huawei columbia-al10b_firmware 9.1.0.333\(c00e333r1p1t8\)
  • huawei columbia-al10i_firmware 9.1.0.335\(c675e8r1p9t8\)
  • huawei columbia-l29d_firmware 9.1.0.350\(c10e5r1p14t8\), 9.1.0.350\(c185e3r1p12t8\), 9.1.0.350\(c461e3r1p11t8\), 9.1.0.350\(c636e3r1p13t8\), 9.1.0.351\(c432e5r1p13t8\)
  • linux Debian 14, Debian 13, Debian 12 5.2.6-1

debian advisories DEBIAN-CVE-2019-9506

  • linux Ubuntu 16.04 LTS 4.4.0-159.187
  • linux Ubuntu 18.04 LTS 4.15.0-60.67
  • linux-aws Ubuntu 16.04 LTS 4.4.0-1090.101
  • linux-aws Ubuntu 18.04 LTS 4.15.0-1047.49
  • linux-gcp Ubuntu 16.04 LTS 4.15.0-1041.43
  • linux-gcp Ubuntu 18.04 LTS 4.15.0-1042.45
  • linux-hwe Ubuntu 16.04 LTS 4.15.0-60.67~16.04.1
  • linux-hwe Ubuntu 18.04 LTS 5.0.0-31.33~18.04.1

ubuntu advisories UBUNTU-CVE-2019-9506

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 8 4.18.0-147.el8
  • perf RHEL 8 4.18.0-147.el8
  • bpftool RHEL 8 4.18.0-147.el8
  • kernel-core RHEL 8 4.18.0-147.el8
  • kernel-tools RHEL 8 4.18.0-147.el8
  • python3-perf RHEL 8 4.18.0-147.el8
  • kernel-modules RHEL 8 4.18.0-147.el8
  • kernel-zfcpdump RHEL 8 4.18.0-147.el8

red hat advisories RHSA-2019:3517RHSA-2020:1460RHSA-2019:3309RHSA-2020:0204RHSA-2019:3217RHSA-2019:3218

  • kernel-azure SLES for SAP 12 SP5, SLES 12 SP5 4.12.14-16.7.1
  • kernel-syms-azure SLES for SAP 12 SP5, SLES 12 SP5 4.12.14-16.7.1
  • kernel-source-azure SLES for SAP 12 SP5, SLES 12 SP5 4.12.14-16.7.1
  • kernel-rt Real Time Module 15 SP1 4.12.14-14.14.3
  • kernel-syms-rt Real Time Module 15 SP1 4.12.14-14.14.2
  • kernel-rt_debug Real Time Module 15 SP1 4.12.14-14.14.3
  • kernel-source-rt Real Time Module 15 SP1 4.12.14-14.14.2
  • kernel-syms SLES for SAP 12 SP5, SLES 12 SP5 4.12.14-122.7.1

suse advisories SUSE-SU-2020:0093-1SUSE-SU-2019:3295-1SUSE-SU-2019:3200-1SUSE-SU-2019:2984-1SUSE-SU-2019:2949-1SUSE-SU-2019:2950-1

  • kernel-syms openSUSE Leap 15.1 4.12.14-lp151.28.20.1
  • kernel-obs-qa openSUSE Leap 15.1 4.12.14-lp151.28.20.1
  • kernel-source openSUSE Leap 15.1 4.12.14-lp151.28.20.1
  • kernel-default openSUSE Leap 15.1 4.12.14-lp151.28.20.1
  • kernel-vanilla openSUSE Leap 15.1 4.12.14-lp151.28.20.1
  • kernel-kvmsmall openSUSE Leap 15.1 4.12.14-lp151.28.20.1
  • kernel-obs-build openSUSE Leap 15.1 4.12.14-lp151.28.20.1
  • kernel-syms openSUSE Leap 15.0 4.12.14-lp150.12.76.1

opensuse advisories openSUSE-SU-2019:2308-1openSUSE-SU-2019:2307-1

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-2019-9506 updated cvss 7.0

hardware: bluetooth: BR/EDR encryption key negotiation attacks (KNOB)

  • Red Hat Enterprise Linux 5 kernel
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more
    affected: workaround, no fix planned “Will not fix”
  • Red Hat CodeReady Linux Builder (v. 8) kernel-debuginfo-common-x86_64 4.18.0-147.el8, kernel-debuginfo-common-aarch64 4.18.0-147.el8, kernel-debuginfo-common-ppc64le 4.18.0-147.el8 Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-147.el8, kernel 4.18.0-147.el8, bpftool 4.18.0-147.el8, kernel-core 4.18.0-147.el8, kernel-tools 4.18.0-147.el8, python3-perf 4.18.0-147.el8, +15 more
    fixed: vendor fix RHSA-2019:3517
  • Red Hat Enterprise Linux BaseOS E4S (v. 8.0) perf 4.18.0-80.15.1.el8_0, kernel 4.18.0-80.15.1.el8_0, bpftool 4.18.0-80.15.1.el8_0, kernel-core 4.18.0-80.15.1.el8_0, kernel-tools 4.18.0-80.15.1.el8_0, python3-perf 4.18.0-80.15.1.el8_0, +9 more
    fixed: vendor fix RHSA-2020:0204
  • Red Hat Enterprise Linux Client (v. 7) perf 3.10.0-1062.4.1.el7, kernel 3.10.0-1062.4.1.el7, bpftool 3.10.0-1062.4.1.el7, python-perf 3.10.0-1062.4.1.el7, kernel-tools 3.10.0-1062.4.1.el7, kernel-tools-libs 3.10.0-1062.4.1.el7, +2 more Red Hat Enterprise Linux Client Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1062.4.1.el7 Red Hat Enterprise Linux ComputeNode (v. 7) perf 3.10.0-1062.4.1.el7, kernel 3.10.0-1062.4.1.el7, bpftool 3.10.0-1062.4.1.el7, python-perf 3.10.0-1062.4.1.el7, kernel-tools 3.10.0-1062.4.1.el7, kernel-tools-libs 3.10.0-1062.4.1.el7, +2 more
    fixed: vendor fix RHSA-2019:3055
  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.5) perf 3.10.0-862.43.1.el7, kernel 3.10.0-862.43.1.el7, python-perf 3.10.0-862.43.1.el7, kernel-tools 3.10.0-862.43.1.el7, kernel-tools-libs 3.10.0-862.43.1.el7, kernel-abi-whitelists 3.10.0-862.43.1.el7, +1 more
    fixed: vendor fix RHSA-2019:2975
  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.6) perf 3.10.0-957.38.1.el7, kernel 3.10.0-957.38.1.el7, bpftool 3.10.0-957.38.1.el7, python-perf 3.10.0-957.38.1.el7, kernel-tools 3.10.0-957.38.1.el7, kernel-tools-libs 3.10.0-957.38.1.el7, +2 more
    fixed: vendor fix RHSA-2019:3220
  • Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1062.4.1.el7
    fixed: vendor fix RHSA-2019:3055
show 27 more
  • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.5) kernel-debuginfo-common-x86_64 3.10.0-862.43.1.el7
    fixed: vendor fix RHSA-2019:2975
  • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6) kernel-debuginfo-common-x86_64 3.10.0-957.38.1.el7
    fixed: vendor fix RHSA-2019:3220
  • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) perf 4.14.0-115.14.1.el7a, kernel 4.14.0-115.14.1.el7a, kernel-alt 4.14.0-115.14.1.el7a, python-perf 4.14.0-115.14.1.el7a, kernel-tools 4.14.0-115.14.1.el7a, kernel-tools-libs 4.14.0-115.14.1.el7a, +3 more Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) kernel-debuginfo-common-ppc64le 4.14.0-115.14.1.el7a
    fixed: vendor fix RHSA-2019:3217
  • Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt 3.10.0-1062.4.1.rt56.1027.el7, kernel-rt-kvm 3.10.0-1062.4.1.rt56.1027.el7, kernel-rt-trace 3.10.0-1062.4.1.rt56.1027.el7, kernel-rt-debug-kvm 3.10.0-1062.4.1.rt56.1027.el7, kernel-rt-trace-kvm 3.10.0-1062.4.1.rt56.1027.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1062.4.1.rt56.1027.el7
    fixed: vendor fix RHSA-2019:3089
  • Red Hat Enterprise Linux Real Time (v. 8) kernel-rt 4.18.0-147.rt24.93.el8, kernel-rt-core 4.18.0-147.rt24.93.el8, kernel-rt-modules 4.18.0-147.rt24.93.el8, kernel-rt-debug-core 4.18.0-147.rt24.93.el8, kernel-rt-debug-modules 4.18.0-147.rt24.93.el8, kernel-rt-modules-extra 4.18.0-147.rt24.93.el8, +2 more Red Hat Enterprise Linux Real Time for NFV (v. 8) kernel-rt 4.18.0-147.rt24.93.el8, kernel-rt-kvm 4.18.0-147.rt24.93.el8, kernel-rt-core 4.18.0-147.rt24.93.el8, kernel-rt-modules 4.18.0-147.rt24.93.el8, kernel-rt-debug-kvm 4.18.0-147.rt24.93.el8, kernel-rt-debug-core 4.18.0-147.rt24.93.el8, +4 more
    fixed: vendor fix RHSA-2019:3309
  • Red Hat Enterprise Linux Realtime (v. 7) kernel-rt 3.10.0-1062.4.1.rt56.1027.el7, kernel-rt-trace 3.10.0-1062.4.1.rt56.1027.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1062.4.1.rt56.1027.el7
    fixed: vendor fix RHSA-2019:3089
  • Red Hat Enterprise Linux Server (v. 7) perf 3.10.0-1062.4.1.el7, kernel 3.10.0-1062.4.1.el7, bpftool 3.10.0-1062.4.1.el7, python-perf 3.10.0-1062.4.1.el7, kernel-kdump 3.10.0-1062.4.1.el7, kernel-tools 3.10.0-1062.4.1.el7, +10 more
    fixed: vendor fix RHSA-2019:3055
  • Red Hat Enterprise Linux Server AUS (v. 7.2) perf 3.10.0-327.86.1.el7, kernel 3.10.0-327.86.1.el7, python-perf 3.10.0-327.86.1.el7, kernel-tools 3.10.0-327.86.1.el7, kernel-tools-libs 3.10.0-327.86.1.el7, kernel-abi-whitelists 3.10.0-327.86.1.el7, +1 more
    fixed: vendor fix RHSA-2020:1460
  • Red Hat Enterprise Linux Server AUS (v. 7.3) perf 3.10.0-514.70.1.el7, kernel 3.10.0-514.70.1.el7, python-perf 3.10.0-514.70.1.el7, kernel-tools 3.10.0-514.70.1.el7, kernel-tools-libs 3.10.0-514.70.1.el7, kernel-abi-whitelists 3.10.0-514.70.1.el7, +1 more
    fixed: vendor fix RHSA-2019:3218
  • Red Hat Enterprise Linux Server AUS (v. 7.4) perf 3.10.0-693.60.1.el7, kernel 3.10.0-693.60.1.el7, python-perf 3.10.0-693.60.1.el7, kernel-tools 3.10.0-693.60.1.el7, kernel-tools-libs 3.10.0-693.60.1.el7, kernel-abi-whitelists 3.10.0-693.60.1.el7, +1 more
    fixed: vendor fix RHSA-2019:3187
  • Red Hat Enterprise Linux Server E4S (v. 7.3) perf 3.10.0-514.70.1.el7, kernel 3.10.0-514.70.1.el7, python-perf 3.10.0-514.70.1.el7, kernel-tools 3.10.0-514.70.1.el7, kernel-tools-libs 3.10.0-514.70.1.el7, kernel-bootwrapper 3.10.0-514.70.1.el7, +3 more
    fixed: vendor fix RHSA-2019:3218
  • Red Hat Enterprise Linux Server E4S (v. 7.4) perf 3.10.0-693.60.1.el7, kernel 3.10.0-693.60.1.el7, python-perf 3.10.0-693.60.1.el7, kernel-tools 3.10.0-693.60.1.el7, kernel-tools-libs 3.10.0-693.60.1.el7, kernel-bootwrapper 3.10.0-693.60.1.el7, +3 more
    fixed: vendor fix RHSA-2019:3187
  • Red Hat Enterprise Linux Server EUS (v. 7.5) perf 3.10.0-862.43.1.el7, kernel 3.10.0-862.43.1.el7, python-perf 3.10.0-862.43.1.el7, kernel-kdump 3.10.0-862.43.1.el7, kernel-tools 3.10.0-862.43.1.el7, kernel-tools-libs 3.10.0-862.43.1.el7, +6 more
    fixed: vendor fix RHSA-2019:2975
  • Red Hat Enterprise Linux Server EUS (v. 7.6) perf 3.10.0-957.38.1.el7, kernel 3.10.0-957.38.1.el7, bpftool 3.10.0-957.38.1.el7, python-perf 3.10.0-957.38.1.el7, kernel-kdump 3.10.0-957.38.1.el7, kernel-tools 3.10.0-957.38.1.el7, +9 more
    fixed: vendor fix RHSA-2019:3220
  • Red Hat Enterprise Linux Server Optional (v. 7) kernel-debuginfo-common-ppc64 3.10.0-1062.4.1.el7, kernel-debuginfo-common-x86_64 3.10.0-1062.4.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-1062.4.1.el7
    fixed: vendor fix RHSA-2019:3055
  • Red Hat Enterprise Linux Server Optional AUS (v. 7.2) kernel-debuginfo-common-x86_64 3.10.0-327.86.1.el7
    fixed: vendor fix RHSA-2020:1460
  • Red Hat Enterprise Linux Server Optional AUS (v. 7.3) kernel-debuginfo-common-x86_64 3.10.0-514.70.1.el7
    fixed: vendor fix RHSA-2019:3218
  • Red Hat Enterprise Linux Server Optional AUS (v. 7.4) kernel-debuginfo-common-x86_64 3.10.0-693.60.1.el7
    fixed: vendor fix RHSA-2019:3187
  • Red Hat Enterprise Linux Server Optional E4S (v. 7.3) kernel-debuginfo-common-x86_64 3.10.0-514.70.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-514.70.1.el7
    fixed: vendor fix RHSA-2019:3218
  • Red Hat Enterprise Linux Server Optional E4S (v. 7.4) kernel-debuginfo-common-x86_64 3.10.0-693.60.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-693.60.1.el7
    fixed: vendor fix RHSA-2019:3187
  • Red Hat Enterprise Linux Server Optional EUS (v. 7.5) kernel-debuginfo-common-ppc64 3.10.0-862.43.1.el7, kernel-debuginfo-common-x86_64 3.10.0-862.43.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-862.43.1.el7
    fixed: vendor fix RHSA-2019:2975
  • Red Hat Enterprise Linux Server Optional EUS (v. 7.6) kernel-debuginfo-common-ppc64 3.10.0-957.38.1.el7, kernel-debuginfo-common-x86_64 3.10.0-957.38.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-957.38.1.el7
    fixed: vendor fix RHSA-2019:3220
  • Red Hat Enterprise Linux Server Optional TUS (v. 7.3) kernel-debuginfo-common-x86_64 3.10.0-514.70.1.el7
    fixed: vendor fix RHSA-2019:3218
  • Red Hat Enterprise Linux Server Optional TUS (v. 7.4) kernel-debuginfo-common-x86_64 3.10.0-693.60.1.el7
    fixed: vendor fix RHSA-2019:3187
  • Red Hat Enterprise Linux Server TUS (v. 7.3) perf 3.10.0-514.70.1.el7, kernel 3.10.0-514.70.1.el7, python-perf 3.10.0-514.70.1.el7, kernel-tools 3.10.0-514.70.1.el7, kernel-tools-libs 3.10.0-514.70.1.el7, kernel-abi-whitelists 3.10.0-514.70.1.el7, +1 more
    fixed: vendor fix RHSA-2019:3218
  • Red Hat Enterprise Linux Server TUS (v. 7.4) perf 3.10.0-693.60.1.el7, kernel 3.10.0-693.60.1.el7, python-perf 3.10.0-693.60.1.el7, kernel-tools 3.10.0-693.60.1.el7, kernel-tools-libs 3.10.0-693.60.1.el7, kernel-abi-whitelists 3.10.0-693.60.1.el7, +1 more
    fixed: vendor fix RHSA-2019:3187
  • Red Hat Enterprise Linux Workstation (v. 7) perf 3.10.0-1062.4.1.el7, kernel 3.10.0-1062.4.1.el7, bpftool 3.10.0-1062.4.1.el7, python-perf 3.10.0-1062.4.1.el7, kernel-tools 3.10.0-1062.4.1.el7, kernel-tools-libs 3.10.0-1062.4.1.el7, +2 more
    fixed: vendor fix RHSA-2019:3055

3 more fixed in the full advisory

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

Exploit prediction

2.69% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.0 7.6 CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
NVD 3.1 8.1 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
NVD 2.0 4.8 AV:A/AC:L/Au:N/C:P/I:P/A:N

Affected products

  • Bluetooth BR/EDR

Classification

Weakness
  • CWE-310 Cryptographic Issues
  • CWE-327 Use of a Broken or Risky Cryptographic Algorithm

References

Sources

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.