CVE-2020-35473: An information leakage vulnerability in the Bluetooth Low Energy advertisement scan response in Bluetooth Core

Routine

MEDIUM 4.3UPGRADE

CVE-2020-35473 is a medium-severity flaw (CVSS 4.3) affecting bluetooth core specification. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An information leakage vulnerability in the Bluetooth Low Energy advertisement scan response in Bluetooth Core Specifications 4.0 through 5.2, and extended scan response in Bluetooth Core Specifications 5.0 through 5.2, may be used to identify devices using Resolvable Private Addressing (RPA) by their response or non-response to specific scan requests from remote addresses. RPAs that have been associated with a specific remote device may also be

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 70%)
CISA exploited list	No
Weakness	CWE-203, CWE-294
Published	2022-11-08
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: bluetooth

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-11-08 06:15 UTCPublished CVE record published
2026-06-17 03:13 UTCUpdated Record last modified

bluetooth bluetooth core specification UPGRADE

Affected: >= 4.0 and <= 5.2

Fixed in: newer than 5.2

Safe to downgrade to: a release before 4.0

1. Check installed version

apt-cache policy bluetooth-core-specification || rpm -q bluetooth-core-specification || bluetooth-core-specification --version

2. UPGRADE to newer than 5.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade bluetooth-core-specification

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade bluetooth-core-specification

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 4.0 (Debian / Ubuntu)

apt-cache madison bluetooth-core-specification sudo apt install bluetooth-core-specification=<VERSION_BEFORE_4.0> sudo apt-mark hold bluetooth-core-specification

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list bluetooth-core-specification sudo dnf downgrade bluetooth-core-specification-<VERSION_BEFORE_4.0> sudo dnf versionlock add bluetooth-core-specification

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-35473?

bluetooth core specification: upgrade to newer than 5.2. Exact commands for each OS are on this page.

Is CVE-2020-35473 being exploited?

CVE-2020-35473 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-35473 affect?

CVE-2020-35473 affects bluetooth core specification. Severity is medium (CVSS 4.3). An information leakage vulnerability in the Bluetooth Low Energy advertisement scan response in Bluetooth Core Specifications 4.0 through 5.2, and extended scan response in Bluetooth Core Specifications 5.0 through 5.2, may be used to ident

How urgent is CVE-2020-35473?

Priority 23/100. No elevated risk signals yet.

Software pages

Bluetooth vulnerabilities

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References

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