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CVE-2026-5590

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CVE-2026-5590

Published: Apr 5, 2026

Modified: Apr 6, 2026

PUBLISHED

CVSS v3.1

6.4

MEDIUM

Description

A race condition during TCP connection teardown can cause tcp_recv() to operate on a connection that has already been released. If tcp_conn_search() returns NULL while processing a SYN packet, a NULL pointer derived from stale context data is passed to tcp_backlog_is_full() and dereferenced without validation, leading to a crash.

VendorProductVersions

zephyrproject-rtos

Zephyr

affected
* - <= 4.3

Weaknesses (CWE)

CWE-476

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

High

References

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