CVE-2021-3455
low-risk
Published 2021-10-19
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
Do I need to act?
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0.39% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
4
CVSS 4.3/10
Medium
ADJACENT_NETWORK
/ LOW complexity
Affected Products (1)
Affected Vendors
21
/ 100
low-risk
Severity
15/34 · Moderate
Exploitability
1/34 · Minimal
Exposure
5/34 · Minimal