HOMEVULNERABILITIESCVE-2021-3658
MEDIUM

CVE-2021-3658

CWE-863Published: March 2, 2022· Updated: Jun 17, 2026

6.5
CVSS v3.1

Official Description

bluetoothd from bluez incorrectly saves adapters' Discoverable status when a device is powered down, and restores it when powered up. If a device is powered down while discoverable, it will be discoverable when powered on again. This could lead to inadvertent exposure of the bluetooth stack to physically nearby attackers.

NVD Source

Technical Analysis

CVE-2021-3658 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 6.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorAdjacent
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected Vendors & Products

bluez1 product(s)
bluez
Fedora1 product(s)
fedora
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories

PATCHhttps://bugzilla.redhat.com/show_bug.cgi?id=1984728
PATCHhttps://git.kernel.org/pub/scm/bluetooth/bluez.git/commit/?id=b497b5942a8beb8f89ca1c359c54ad67ec843055
PATCHhttps://github.com/bluez/bluez/commit/b497b5942a8beb8f89ca1c359c54ad67ec843055
PATCHhttps://gitlab.gnome.org/GNOME/gnome-bluetooth/-/issues/89
PATCHhttps://bugzilla.redhat.com/show_bug.cgi?id=1984728
PATCHhttps://git.kernel.org/pub/scm/bluetooth/bluez.git/commit/?id=b497b5942a8beb8f89ca1c359c54ad67ec843055
PATCHhttps://github.com/bluez/bluez/commit/b497b5942a8beb8f89ca1c359c54ad67ec843055
PATCHhttps://gitlab.gnome.org/GNOME/gnome-bluetooth/-/issues/89
ADVISORYhttps://security.netapp.com/advisory/ntap-20220407-0002/
ADVISORYhttps://security.netapp.com/advisory/ntap-20220407-0002/

All References (11)

→
https://bugzilla.redhat.com/show_bug.cgi?id=1984728Issue Tracking · Patch · Third Party Advisory
→
https://git.kernel.org/pub/scm/bluetooth/bluez.git/commit/?id=b497b5942a8beb8f89ca1c359c54ad67ec843055Patch · Third Party Advisory
→
https://github.com/bluez/bluez/commit/b497b5942a8beb8f89ca1c359c54ad67ec843055Patch · Third Party Advisory
→
https://gitlab.gnome.org/GNOME/gnome-bluetooth/-/issues/89Issue Tracking · Patch · Third Party Advisory
→
https://security.netapp.com/advisory/ntap-20220407-0002/Third Party Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=1984728Issue Tracking · Patch · Third Party Advisory
→
https://git.kernel.org/pub/scm/bluetooth/bluez.git/commit/?id=b497b5942a8beb8f89ca1c359c54ad67ec843055Patch · Third Party Advisory
→
https://github.com/bluez/bluez/commit/b497b5942a8beb8f89ca1c359c54ad67ec843055Patch · Third Party Advisory
→
https://gitlab.gnome.org/GNOME/gnome-bluetooth/-/issues/89Issue Tracking · Patch · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2024/09/msg00022.html
→
https://security.netapp.com/advisory/ntap-20220407-0002/Third Party Advisory

Quick Facts

CVE IDCVE-2021-3658
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-863
CISA KEVNo
Affected2 vendor(s)
PublishedMar 2, 2022

Related CVEs (CWE-863)

CVE-2026-44330
10.0
CVE-2026-48286
10.0
CVE-2020-13300
10.0
CVE-2021-38503
10.0
CVE-2023-4617
10.0
CVE-2018-18815
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-3658 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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