Blutooth BR/EDR specification does not specify sufficient encryption key length and allows an attacker to influence key length negotiation
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.
- BDU:2019-03002
- DLA-1919-1
- openSUSE-SU-2019:2307-1
- openSUSE-SU-2019:2308-1
- RHSA-2019:2975
- RHSA-2019:3055
- RHSA-2019:3076
- RHSA-2019:3089
- RHSA-2019:3165
- RHSA-2019:3187
- RHSA-2019:3217
- RHSA-2019:3218
- RHSA-2019:3220
- RHSA-2019:3231
- RHSA-2020:0204
- RHSA-2020:1460
- SUSE-SU-2019:2706-1
- SUSE-SU-2019:2710-1
- SUSE-SU-2019:2879-1
- SUSE-SU-2019:3295-1
- Published
- Aug 14, 2019
- Updated
- Jun 16, 2026
- EPSS
- 2.7% · 85th percentile
- CWE
- CWE-310
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Report tools
Action score
33
Monitor
Low priority for now.
- CVSS
- 32 / 40 · 8.1 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 2.7%
CNA vs NVD score
- NVD
- 8.1
- CNA · certcc
- 7.6
- 0.5 point gap
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| android | cpe:2.3:o:google:android | |
| blackberry | blackberry | cpe:2.3:h:blackberry:blackberry |
| apple | iphone os | cpe:2.3:o:apple:iphone_os |
| apple | mac os x | cpe:2.3:o:apple:mac_os_x |
| apple | tvos | cpe:2.3:o:apple:tvos |
| apple | watchos | cpe:2.3:o:apple:watchos |
| canonical | ubuntu linux | cpe:2.3:o:canonical:ubuntu_linux |
| debian | debian linux | cpe:2.3:o:debian:debian_linux |
| opensuse | leap | cpe:2.3:o:opensuse:leap |
| redhat | mrg realtime | cpe:2.3:a:redhat:mrg_realtime |
| redhat | virtualization host eus | cpe:2.3:a:redhat:virtualization_host_eus |
| redhat | enterprise linux | cpe:2.3:o:redhat:enterprise_linux |
and 188 more
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- apple iphone os12.4
- apple mac os x10.12.6
- apple mac os x10.13.6
- apple mac os x10.14.5
- apple tvos12.4
- apple watchos5.3
- canonical ubuntu linux16.04
- canonical ubuntu linux18.04
- canonical ubuntu linux19.04
- debian debian linux8.0
- google androidall versions
- huawei alp-al00b firmwarebefore 9.1.0.333\(c00e333r2p1t8\)
- huawei ares-al00b firmwarebefore 9.1.0.160\(c00e160r2p5t8\)
- huawei ares-al10d firmwarebefore 9.1.0.160\(c00e160r2p5t8\)
- huawei ares-tl00c firmwarebefore 9.1.0.165\(c01e165r2p5t8\)
- huawei asoka-al00ax firmwarebefore 9.1.1.181\(c00e48r6p1\)
- huawei atomu-l33 firmwarebefore 8.0.0.147\(c605custc605d1\)
- huawei atomu-l41 firmwarebefore 8.0.0.153\(c461custc461d1\)
- huawei atomu-l42 firmwarebefore 8.0.0.155\(c636custc636d1\)
- huawei barca-al00 firmwarebefore 8.0.0.366\(c00\)
Versions reported by the vendor
Affected version ranges reported by the assigning authority (certcc). Independent of NVD's CPE analysis and usually ahead of it.
Bluetooth BR/EDR
- 5.1 and later · up to and including 5.1affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | linux | before 5.2.6-1 | 5.2.6-1 |
| Debian:8 | linux-4.9 | before 4.9.189-3~deb8u1 | 4.9.189-3~deb8u1 |
| openSUSE:Leap 15.0 | kernel-debug | before 4.12.14-lp150.12.76.1 | 4.12.14-lp150.12.76.1 |
| openSUSE:Leap 15.0 | kernel-default | before 4.12.14-lp150.12.76.1 | 4.12.14-lp150.12.76.1 |
| openSUSE:Leap 15.0 | kernel-docs | before 4.12.14-lp150.12.76.1 | 4.12.14-lp150.12.76.1 |
| openSUSE:Leap 15.0 | kernel-kvmsmall | before 4.12.14-lp150.12.76.1 | 4.12.14-lp150.12.76.1 |
| openSUSE:Leap 15.0 | kernel-obs-build | before 4.12.14-lp150.12.76.1 | 4.12.14-lp150.12.76.1 |
| openSUSE:Leap 15.0 | kernel-obs-qa | before 4.12.14-lp150.12.76.1 | 4.12.14-lp150.12.76.1 |
| openSUSE:Leap 15.0 | kernel-source | before 4.12.14-lp150.12.76.1 | 4.12.14-lp150.12.76.1 |
| openSUSE:Leap 15.0 | kernel-syms | before 4.12.14-lp150.12.76.1 | 4.12.14-lp150.12.76.1 |
| openSUSE:Leap 15.0 | kernel-vanilla | before 4.12.14-lp150.12.76.1 | 4.12.14-lp150.12.76.1 |
| openSUSE:Leap 15.1 | kernel-debug | before 4.12.14-lp151.28.20.1 | 4.12.14-lp151.28.20.1 |
| openSUSE:Leap 15.1 | kernel-default | before 4.12.14-lp151.28.20.1 | 4.12.14-lp151.28.20.1 |
| openSUSE:Leap 15.1 | kernel-docs | before 4.12.14-lp151.28.20.1 | 4.12.14-lp151.28.20.1 |
| openSUSE:Leap 15.1 | kernel-kvmsmall | before 4.12.14-lp151.28.20.1 | 4.12.14-lp151.28.20.1 |
| openSUSE:Leap 15.1 | kernel-obs-build | before 4.12.14-lp151.28.20.1 | 4.12.14-lp151.28.20.1 |
| openSUSE:Leap 15.1 | kernel-obs-qa | before 4.12.14-lp151.28.20.1 | 4.12.14-lp151.28.20.1 |
| openSUSE:Leap 15.1 | kernel-source | before 4.12.14-lp151.28.20.1 | 4.12.14-lp151.28.20.1 |
| openSUSE:Leap 15.1 | kernel-syms | before 4.12.14-lp151.28.20.1 | 4.12.14-lp151.28.20.1 |
| openSUSE:Leap 15.1 | kernel-vanilla | before 4.12.14-lp151.28.20.1 | 4.12.14-lp151.28.20.1 |
| Red Hat:enterprise_linux:7::client | bpftool | before 0:3.10.0-1062.4.1.el7 | 0:3.10.0-1062.4.1.el7 |
| Red Hat:enterprise_linux:7::client | bpftool-debuginfo | before 0:3.10.0-1062.4.1.el7 | 0:3.10.0-1062.4.1.el7 |
| Red Hat:enterprise_linux:7::client | kernel | before 0:3.10.0-1062.4.1.el7 | 0:3.10.0-1062.4.1.el7 |
| Red Hat:enterprise_linux:7::client | kernel-abi-whitelists | before 0:3.10.0-1062.4.1.el7 | 0:3.10.0-1062.4.1.el7 |
+96
Same product
google: all recordsOther highest-scoring records for the same primary product.
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- CVE-2015-3824The MPEG4Extractor::parseChunk function in MPEG4Extractor.cpp in libstagefright in Android before 5.1.1 LMY48I does not properly restrict si67This week
- CVE-2015-3864Integer underflow in the MPEG4Extractor::parseChunk function in MPEG4Extractor.cpp in libstagefright in mediaserver in Android before 5.1.1 66This week
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:linux | 5.2.6-1 · Debian:12 | Package registry (OSV) |
| debian:linux-4.9 | 4.9.189-3~deb8u1 · Debian:8 | Package registry (OSV) |
| opensuse:kernel-debug | 4.12.14-lp150.12.76.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| opensuse:kernel-default | 4.12.14-lp150.12.76.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| opensuse:kernel-docs | 4.12.14-lp150.12.76.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| opensuse:kernel-kvmsmall | 4.12.14-lp150.12.76.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| opensuse:kernel-obs-build | 4.12.14-lp150.12.76.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| opensuse:kernel-obs-qa | 4.12.14-lp150.12.76.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| opensuse:kernel-source | 4.12.14-lp150.12.76.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| opensuse:kernel-syms | 4.12.14-lp150.12.76.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| opensuse:kernel-vanilla | 4.12.14-lp150.12.76.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| red hat:kernel | 0:3.10.0-862.43.1.el7 · Red Hat:rhel_eus:7.5::computenode | Package registry (OSV) |
| red hat:kernel-abi-whitelists | 0:3.10.0-862.43.1.el7 · Red Hat:rhel_eus:7.5::computenode | Package registry (OSV) |
| red hat:kernel-debug | 0:3.10.0-862.43.1.el7 · Red Hat:rhel_eus:7.5::computenode | Package registry (OSV) |
| red hat:kernel-debug-debuginfo | 0:3.10.0-862.43.1.el7 · Red Hat:rhel_eus:7.5::computenode | Package registry (OSV) |
| red hat:kernel-debug-devel | 0:3.10.0-862.43.1.el7 · Red Hat:rhel_eus:7.5::computenode | Package registry (OSV) |
| red hat:kernel-debuginfo | 0:3.10.0-862.43.1.el7 · Red Hat:rhel_eus:7.5::computenode | Package registry (OSV) |
| red hat:kernel-debuginfo-common-x86_64 | 0:3.10.0-862.43.1.el7 · Red Hat:rhel_eus:7.5::computenode | Package registry (OSV) |
| red hat:kernel-devel | 0:3.10.0-862.43.1.el7 · Red Hat:rhel_eus:7.5::computenode | Package registry (OSV) |
| red hat:kernel-doc | 0:3.10.0-862.43.1.el7 · Red Hat:rhel_eus:7.5::computenode | Package registry (OSV) |
| red hat:kernel-tools | 0:3.10.0-862.43.1.el7 · Red Hat:rhel_eus:7.5::computenode | Package registry (OSV) |
| red hat:kernel-tools-debuginfo | 0:3.10.0-862.43.1.el7 · Red Hat:rhel_eus:7.5::computenode | Package registry (OSV) |
| red hat:kernel-tools-libs | 0:3.10.0-862.43.1.el7 · Red Hat:rhel_eus:7.5::computenode | Package registry (OSV) |
| suse:kernel-default | 4.12.14-150.38.1 · SUSE:Linux Enterprise Module for Basesystem 15 | Package registry (OSV) |
| suse:kernel-docs | 4.12.14-150.38.1 · SUSE:Linux Enterprise Module for Development Tools 15 | Package registry (OSV) |
| suse:kernel-livepatch-SLE15_Update_15 | 1-1.3.1 · SUSE:Linux Enterprise Live Patching 15 | Package registry (OSV) |
| suse:kernel-livepatch-SLE15-SP1_Update_6 | 1-3.3.1 · SUSE:Linux Enterprise Live Patching 15 SP1 | Package registry (OSV) |
| suse:kernel-obs-build | 4.12.14-150.38.1 · SUSE:Linux Enterprise Module for Development Tools 15 | Package registry (OSV) |
| suse:kernel-rt | 4.12.14-14.14.3 · SUSE:Real Time Module 15 SP1 | Package registry (OSV) |
| suse:kernel-rt_debug | 4.12.14-14.14.3 · SUSE:Real Time Module 15 SP1 | Package registry (OSV) |
+5
Exploit status
Proof of concept available
A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.
Evidence
- Proof-of-concept repository on GitHub ×2
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Proof-of-concept repository on GitHub | stars:188 | 2019-08-15 |
| Proof-of-concept repository on GitHub | stars:0 | 2025-12-20 |
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- Published
- First PoCsame day
- TodaySep 30, 2026+2604 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Someone on the same network segment can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- none
- Attack vector
- Adjacent
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- None
Weakness class (CWE)
CWE-310 · Cryptographic IssuesCVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- lists.opensuse.org/opensuse-security-announce/2019-10/msg00036.html
- lists.opensuse.org/opensuse-security-announce/2019-10/msg00037.html
- seclists.org/fulldisclosure/2019/Aug/11
- seclists.org/fulldisclosure/2019/Aug/13
- seclists.org/fulldisclosure/2019/Aug/14
- seclists.org/fulldisclosure/2019/Aug/15
- www.cs.ox.ac.uk/publications/publication12404-abstract.html
- www.huawei.com/en/psirt/security-advisories/huawei-sa-20190828-01-knob-en
- access.redhat.com/errata/RHSA-2019:2975
- access.redhat.com/errata/RHSA-2019:3055
- access.redhat.com/errata/RHSA-2019:3076
- access.redhat.com/errata/RHSA-2019:3089
- access.redhat.com/errata/RHSA-2019:3165
- access.redhat.com/errata/RHSA-2019:3187
- access.redhat.com/errata/RHSA-2019:3217
- access.redhat.com/errata/RHSA-2019:3218
- access.redhat.com/errata/RHSA-2019:3220
- access.redhat.com/errata/RHSA-2019:3231
- access.redhat.com/errata/RHSA-2019:3309
- access.redhat.com/errata/RHSA-2019:3517
Vendor advisories and official records. Exploit/PoC links are deliberately left out.