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CVE-2021-3454

Truncated L2CAP K-frame causes assertion failure

HIGH
7.5
CVSS Score
Published: October 19, 2021 at 10:50 PM UTC
Updated: June 17, 2026 at 04:05 AM UTC
2 products affected across 2 vendorsZephyrZephyr

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Severity
HIGH7.5
Exploit prediction
EPSS 1.0%

Description

Truncated L2CAP K-frame causes assertion failure. Zephyr versions >= 2.4.0, >= v.2.50 contain Improper Handling of Length Parameter Inconsistency (CWE-130), Reachable Assertion (CWE-617). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-fx88-6c29-vrp3

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Zephyr· Zephyrproject
95%
2.4.0 ≤ v < 2.6.0
Affected range stops below 2.6.0, so it looks safe — our inference, not a vendor statement
Zephyr· Zephyrproject RTOS
60%
v ≥ 2.4.0v ≥ v.2.502.4.02.50

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
http://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-fx88-6c29-vrp3

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-130CWE-617

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