CVE-2021-28135 Denial of service in n/a

What is CVE-2021-28135?

CVE-2021-28135 is a medium-severity denial of service vulnerability in n/a, published on 7 Sep 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The Bluetooth Classic implementation in Espressif ESP-IDF 4.4 and earlier does not properly handle the reception of continuous unsolicited LMP responses, allowing attackers in radio range to trigger a denial of service (crash) in ESP32 by flooding the target device with LMP Feature Response data.

Which versions are affected by CVE-2021-28135?

It affects 1 product.

Products include Espressif Esp-Idf.

How do I fix CVE-2021-28135?

No fix has been published for CVE-2021-28135 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2021-28135 being exploited?

There is no known exploitation of CVE-2021-28135 in the wild and no public exploit code.

Other vulnerabilities in n/a

• CVE-2026-45328 ESF-IDF: Out-of-Bounds Write in ESP-TEE Secure Service Wrappers Critical 9.3
• CVE-2024-53406 Auth bypass in n/a High 8.8
• CVE-2021-28139 Memory corruption in n/a High 8.8
• CVE-2024-33453 Information disclosure in n/a High 8.1
• CVE-2019-12587 Weak cryptography in n/a High 8.1

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-jff7-h8x2-v2hj.