CVE-2019-16336: The Bluetooth Low Energy implementation in Cypress PSoC 4 BLE component 3.61 and earlier processes data channe

Q: How do I fix CVE-2019-16336?

cyble-416045: upgrade to newer than 2.10; cybl11573: upgrade to newer than 3.61. Exact commands for each OS are on this page.

Q: Is CVE-2019-16336 being exploited?

CVE-2019-16336 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-2019-16336 affect?

CVE-2019-16336 affects cyble-416045, cybl11573. Severity is medium (CVSS 6.5). The Bluetooth Low Energy implementation in Cypress PSoC 4 BLE component 3.61 and earlier processes data channel frames with a payload length larger than the configured link layer maximum RX payload size, which allows attackers (in radio ran

Q: How urgent is CVE-2019-16336?

Priority 46/100. Public exploit reference

This month

MEDIUM 6.5UPGRADEUPGRADE

CVE-2019-16336 is a medium-severity flaw (CVSS 6.5) affecting cyble-416045, cybl11573. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Bluetooth Low Energy implementation in Cypress PSoC 4 BLE component 3.61 and earlier processes data channel frames with a payload length larger than the configured link layer maximum RX payload size, which allows attackers (in radio range) to cause a denial of service (crash) via a crafted BLE Link Layer frame.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.5% (top 26%)
CISA exploited list	No
Weakness	CWE-120
Published	2020-02-12
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: cypress

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

Am I affected?

Timeline

2020-02-12 18:15 UTCPublished CVE record published
2026-06-17 02:22 UTCUpdated Record last modified

cypress cyble-416045 UPGRADE

Affected: <= 2.10

Fixed in: newer than 2.10

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy cyble-416045 || rpm -q cyble-416045 || cyble-416045 --version

2. UPGRADE to newer than 2.10 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade cyble-416045

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cyble-416045

Note

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

cypress cybl11573 UPGRADE

Affected: <= 3.61

Fixed in: newer than 3.61

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy cybl11573 || rpm -q cybl11573 || cybl11573 --version

2. UPGRADE to newer than 3.61 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade cybl11573

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cybl11573

Note

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

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-2019-16336?

cyble-416045: upgrade to newer than 2.10; cybl11573: upgrade to newer than 3.61. Exact commands for each OS are on this page.

Is CVE-2019-16336 being exploited?

CVE-2019-16336 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-2019-16336 affect?

CVE-2019-16336 affects cyble-416045, cybl11573. Severity is medium (CVSS 6.5). The Bluetooth Low Energy implementation in Cypress PSoC 4 BLE component 3.61 and earlier processes data channel frames with a payload length larger than the configured link layer maximum RX payload size, which allows attackers (in radio ran

How urgent is CVE-2019-16336?

Priority 46/100. Public exploit reference

Software pages

Bluetooth vulnerabilities

References

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