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CVE-2021-3322

Unexpected Pointer Aliasing in IEEE 802154 Fragment Reassembly in Zephyr

MEDIUM
6.5
CVSS Score
Published: October 12, 2021 at 09:50 PM UTC
Updated: June 17, 2026 at 04:04 AM UTC
2 products affected across 2 vendorsZephyrZephyr

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.5%

Description

Unexpected Pointer Aliasing in IEEE 802154 Fragment Reassembly in Zephyr. Zephyr versions >= >=2.4.0 contain NULL Pointer Dereference (CWE-476). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-p86r-gc4r-4mq3

Affected

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

Zephyr· Zephyrproject
95%
2.4.0 ≤ v < 2.5.0
Affected range stops below 2.5.0, so it looks safe — our inference, not a vendor statement
Zephyr· Zephyrproject RTOS
60%
v ≥ >=2.4.0>=2.4.0

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_MISCExploitPatchThird Party Advisory
Source: [email protected]
http://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-p86r-gc4r-4mq3

CVSS

6.5MEDIUMzephyr
Attack Vector
ADJACENT_NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-476

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