8.1

CVE-2021-47620: Bluetooth: refactor malicious adv data check

Modified
AliasesUBUNTU-CVE-2021-47620DEBIAN-CVE-2021-47620
Published 20-06-2024Last modified 05-08-2026

Vulnerability summary

CVE-2021-47620 is a high (CVSS 8.1) Out-of-bounds Read vulnerability in linux. EPSS estimates a 0.32% chance of exploitation in the next 30 days, higher than 25.5% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 8.1, adjacent network); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
8.1/10
010
High · v3.1 (CVE.org)
EPSS score
0.32%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 8 · Related 8
SUSE-SU-2024:2362-1SUSE-SU-2024:2372-1SUSE-SU-2024:2384-1SUSE-SU-2024:2394-1SUSE-SU-2024:2902-1SUSE-SU-2024:2929-1

Timeline

  1. 20-06-2024
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.32%

Chance of exploitation in the next 30 days

Percentile

26%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.32% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: adjacent network, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu90 products
  • linuxAll versions (No fix recorded) | < 4.15.0-173.182 | < 5.4.0-107.121
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 4.15.0-1126.135 | < 5.4.0-1071.76
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 048acfa4daf167b007b6bd8bef474e90c2282a5f, < 305e92f525450f3e1b5f5c9dc7eadb152d66a082 | ≥ 7d4238edd3bf8b8c75571cc3b382bc10438ac588, < 7889b38a7f21ed19314f83194622b195d328465c | ≥ 185c77cbb53bc7481acc5a0b4e6119bbe393d561, < 5a539c08d743d9910631448da78af5e961664c0e | ≥ 4a1491432394b22e585a185ffca49086e4046aae, < 8819f93cd4a443dfe547aa622b21f723757df3fb | ≥ 24161b9c43de966789d5956428f45002d10f878e, < 835d3706852537bf92eb23eb8635b8dee0c0aa67 | ≥ ffc9019bd991707701273c2e5d8aed472229fc4d, < 83d5196b65d1b29e27d7dd16a3b9b439fb1d2dba | ≥ 2de0e6a71ceb056e17e4684dce8b7640367996f9, < bcea886771c3f22a590c8c8b9139a107bd7f1e1c | ≥ 640a476e38fce6c70c738ac09e5167e34f570303, < 5c968affa804ba98c3c603f37ffea6fba618025e | ≥ 3a56ef719f0b9682afb8a86d64b2399e36faa4e6, < 899663be5e75dc0174dc8bda0b5e6826edf0b29a | ≥ 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
  • linux_kernel< 4.4.302 | ≥ 4.5, < 4.9.300 | ≥ 4.10, < 4.14.265 | ≥ 4.15, < 4.19.228 | ≥ 4.20, < 5.4.176 | ≥ 5.5, < 5.10.96 | ≥ 5.11, < 5.15.19 | ≥ 5.16, < 5.16.5
Debian1 product
  • linux< 5.16.7-1

3 vendors · 93 products

References

13 links
Show all 13 references