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CVE-2021-3581

Buffer Access with Incorrect Length Value in zephyr

HIGH
8.8
CVSS Score
Published: October 5, 2021 at 08:50 PM UTC
Updated: June 17, 2026 at 04:05 AM UTC
2 products affected across 2 vendorsZephyrZephyr

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Severity
HIGH8.8
Exploit prediction
EPSS 0.3%

Description

Buffer Access with Incorrect Length Value in zephyr. Zephyr versions >= >=2.5.0 contain Buffer Access with Incorrect Length Value (CWE-805). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-8q65-5gqf-fmw5

Affected

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

Zephyr· Zephyrproject
95%
2.5.0 ≤ 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 ≥ >=2.5.0>=2.5.0

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_MISCPatchVendor Advisory
Source: [email protected]
http://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-8q65-5gqf-fmw5

CVSS

8.8HIGH[email protected]
Attack Vector
ADJACENT_NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-805CWE-1284

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