CVE-2023-24023: Bluetooth BR/EDR devices with Secure Simple Pairing and Secure Connections pairing in Bluetooth Core Specifica

Q: How do I fix CVE-2023-24023?

bluetooth core specification: upgrade to newer than 5.4; windows 10 1809: upgrade to 10.0.17763.5122; windows 10 21h2: upgrade to 10.0.19043.3693. Exact commands for each OS are on this page.

Q: Is CVE-2023-24023 being exploited?

CVE-2023-24023 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-24023 affect?

CVE-2023-24023 affects bluetooth core specification, windows 10 1809, windows 10 21h2. Severity is medium (CVSS 6.8). Bluetooth BR/EDR devices with Secure Simple Pairing and Secure Connections pairing in Bluetooth Core Specification 4.2 through 5.4 allow certain man-in-the-middle attacks that force a short key length, and might lead to discovery of the enc

Q: How urgent is CVE-2023-24023?

Priority 46/100. On your watchlist

This month

MEDIUM 6.8WATCHLISTUPGRADEUPGRADEUPGRADE

CVE-2023-24023 is a medium-severity flaw (CVSS 6.8) affecting bluetooth core specification, windows 10 1809, windows 10 21h2. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Bluetooth BR/EDR devices with Secure Simple Pairing and Secure Connections pairing in Bluetooth Core Specification 4.2 through 5.4 allow certain man-in-the-middle attacks that force a short key length, and might lead to discovery of the encryption key and live injection, aka BLUFFS.

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	6.8 (Medium)
Attack vector	Adjacent network
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	1.3% (top 30%)
CISA exploited list	No
Published	2023-11-28
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: bluetooth · microsoft

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

Am I affected?

Timeline

2023-11-28 07:15 UTCPublished CVE record published
2026-06-17 05:38 UTCUpdated Record last modified

bluetooth bluetooth core specification UPGRADE

Affected: >= 4.2 and <= 5.4

Fixed in: newer than 5.4

Safe to downgrade to: a release before 4.2

1. Check installed version

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

2. UPGRADE to newer than 5.4 (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 4.2 (Debian / Ubuntu)

apt-cache madison bluetooth-core-specification sudo apt install bluetooth-core-specification=<VERSION_BEFORE_4.2> 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_4.2> 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.

microsoft windows 10 1809 UPGRADE

Affected: < 10.0.17763.5122

Fixed in: 10.0.17763.5122

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

microsoft windows 10 21h2 UPGRADE

Affected: < 10.0.19043.3693

Fixed in: 10.0.19043.3693

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

microsoft windows 10 22h2 UPGRADE

Affected: < 10.0.19045.3693

Fixed in: 10.0.19045.3693

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

microsoft windows 11 21h2 UPGRADE

Affected: < 10.0.22000.2600

Fixed in: 10.0.22000.2600

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

microsoft windows 11 22h2 UPGRADE

Affected: < 10.0.22621.2715

Fixed in: 10.0.22621.2715

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2023-24023?

bluetooth core specification: upgrade to newer than 5.4; windows 10 1809: upgrade to 10.0.17763.5122; windows 10 21h2: upgrade to 10.0.19043.3693. Exact commands for each OS are on this page.

Is CVE-2023-24023 being exploited?

CVE-2023-24023 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-2023-24023 affect?

CVE-2023-24023 affects bluetooth core specification, windows 10 1809, windows 10 21h2. Severity is medium (CVSS 6.8). Bluetooth BR/EDR devices with Secure Simple Pairing and Secure Connections pairing in Bluetooth Core Specification 4.2 through 5.4 allow certain man-in-the-middle attacks that force a short key length, and might lead to discovery of the enc

How urgent is CVE-2023-24023?

Priority 46/100. On your watchlist

Software pages

Windows vulnerabilities · Bluetooth vulnerabilities

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References

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