Answer in brief
CVE-2021-47620 records a High severity (CVSS 8.1) vulnerability in Bluetooth: refactor malicious adv data check. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2021-47620 records a High severity (CVSS 8.1) vulnerability in Bluetooth: refactor malicious adv data check. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=048acfa4daf167b007b6bd8bef474e90c2282a5f <305e92f525450f3e1b5f5c9dc7eadb152d66a082 || >=7d4238edd3bf8b8c75571cc3b382bc10438ac588 <7889b38a7f21ed19314f83194622b195d328465c || >=185c77cbb53bc7481acc5a0b4e6119bbe393d561 <5a539c08d743d9910631448da78af5e961664c0e || >=4a1491432394b22e585a185ffca49086e4046aae <8819f93cd4a443dfe547aa622b21f723757df3fb || >=24161b9c43de966789d5956428f45002d10f878e <835d3706852537bf92eb23eb8635b8dee0c0aa67 || >=ffc9019bd991707701273c2e5d8aed472229fc4d <83d5196b65d1b29e27d7dd16a3b9b439fb1d2dba || >=2de0e6a71ceb056e17e4684dce8b7640367996f9 <bcea886771c3f22a590c8c8b9139a107bd7f1e1c || >=640a476e38fce6c70c738ac09e5167e34f570303 <5c968affa804ba98c3c603f37ffea6fba618025e || >=3a56ef719f0b9682afb8a86d64b2399e36faa4e6 <899663be5e75dc0174dc8bda0b5e6826edf0b29a | 305e92f525450f3e1b5f5c9dc7eadb152d66a082, 7889b38a7f21ed19314f83194622b195d328465c, 5a539c08d743d9910631448da78af5e961664c0e, 8819f93cd4a443dfe547aa622b21f723757df3fb, 835d3706852537bf92eb23eb8635b8dee0c0aa67, 83d5196b65d1b29e27d7dd16a3b9b439fb1d2dba, bcea886771c3f22a590c8c8b9139a107bd7f1e1c, 5c968affa804ba98c3c603f37ffea6fba618025e, 899663be5e75dc0174dc8bda0b5e6826edf0b29a |
| Linux/Linuxgeneric | >=4.4.300 <4.4.302 || >=4.9.298 <4.9.300 || >=4.14.263 <4.14.265 || >=4.19.226 <4.19.228 || >=5.4.174 <5.4.176 || >=5.10.94 <5.10.96 || >=5.15.17 <5.15.19 || >=5.16.3 <5.16.5 | 4.4.302, 4.9.300, 4.14.265, 4.19.228, 5.4.176, 5.10.96, 5.15.19, 5.16.5 |
Published upstream
Jun 20, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: refactor malicious adv data check Check for out-of-bound read was being performed at the end of while num_reports loop, and would fill journal with false positives. Added check to beginning of loop processing so that it doesn't get checked after ptr has been advanced.
Quoted source text, attributed separately from HOL analysis.
CVSS is 8.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=048acfa4daf167b007b6bd8bef474e90c2282a5f <305e92f525450f3e1b5f5c9dc7eadb152d66a082 || >=7d4238edd3bf8b8c75571cc3b382bc10438ac588 <7889b38a7f21ed19314f83194622b195d328465c || >=185c77cbb53bc7481acc5a0b4e6119bbe393d561 <5a539c08d743d9910631448da78af5e961664c0e || >=4a1491432394b22e585a185ffca49086e4046aae <8819f93cd4a443dfe547aa622b21f723757df3fb || >=24161b9c43de966789d5956428f45002d10f878e <835d3706852537bf92eb23eb8635b8dee0c0aa67 || >=ffc9019bd991707701273c2e5d8aed472229fc4d <83d5196b65d1b29e27d7dd16a3b9b439fb1d2dba || >=2de0e6a71ceb056e17e4684dce8b7640367996f9 <bcea886771c3f22a590c8c8b9139a107bd7f1e1c || >=640a476e38fce6c70c738ac09e5167e34f570303 <5c968affa804ba98c3c603f37ffea6fba618025e || >=3a56ef719f0b9682afb8a86d64b2399e36faa4e6 <899663be5e75dc0174dc8bda0b5e6826edf0b29a | 305e92f525450f3e1b5f5c9dc7eadb152d66a082, 7889b38a7f21ed19314f83194622b195d328465c, 5a539c08d743d9910631448da78af5e961664c0e, 8819f93cd4a443dfe547aa622b21f723757df3fb, 835d3706852537bf92eb23eb8635b8dee0c0aa67, 83d5196b65d1b29e27d7dd16a3b9b439fb1d2dba, bcea886771c3f22a590c8c8b9139a107bd7f1e1c, 5c968affa804ba98c3c603f37ffea6fba618025e, 899663be5e75dc0174dc8bda0b5e6826edf0b29a |
| Linux/Linuxgeneric | >=4.4.300 <4.4.302 || >=4.9.298 <4.9.300 || >=4.14.263 <4.14.265 || >=4.19.226 <4.19.228 || >=5.4.174 <5.4.176 || >=5.10.94 <5.10.96 || >=5.15.17 <5.15.19 || >=5.16.3 <5.16.5 | 4.4.302, 4.9.300, 4.14.265, 4.19.228, 5.4.176, 5.10.96, 5.15.19, 5.16.5 |
Published upstream
Jun 20, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: refactor malicious adv data check Check for out-of-bound read was being performed at the end of while num_reports loop, and would fill journal with false positives. Added check to beginning of loop processing so that it doesn't get checked after ptr has been advanced.
Quoted source text, attributed separately from HOL analysis.