CVE-2021-3455

Public Exploit
Disconnecting L2CAP channel right after invalid ATT request leads freeze

Description

Disconnecting L2CAP channel right after invalid ATT request leads freeze. Zephyr versions >= 2.4.0, >= 2.5.0 contain Use After Free (CWE-416). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-7g38-3x9v-v7vp

Category

4.3
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.39%
Third-Party Advisory github.com
Affected: zephyrproject-rtos zephyr
Published at:
Updated at:

References

Link Tags
http://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-7g38-3x9v-v7vp third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2021-3455?
CVE-2021-3455 has been scored as a medium severity vulnerability.
How to fix CVE-2021-3455?
To fix CVE-2021-3455, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-3455 being actively exploited in the wild?
It is possible that CVE-2021-3455 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-3455?
CVE-2021-3455 affects zephyrproject-rtos zephyr.
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