CVE-2026-5590

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.

CVSS v3 6.4 MEDIUM

6.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.6 / Impact : 4.7

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-4vqm-pw24-g9jp	Exploit Patch Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:o:zephyrproject:zephyr:*:*:*:*:*:*:*:*

History

08 Jul 2026, 13:38

Type	Values Removed	Values Added
References	~~() https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-4vqm-pw24-g9jp -~~	() https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-4vqm-pw24-g9jp - Exploit, Patch, Vendor Advisory
First Time		Zephyrproject zephyr Zephyrproject
CPE		cpe:2.3:o:zephyrproject:zephyr::::::::

05 Apr 2026, 04:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-05 04:16

Updated : 2026-07-08 13:38

NVD link : CVE-2026-5590

Mitre link : CVE-2026-5590

CVE.ORG link : CVE-2026-5590

JSON object : View

Products Affected

zephyrproject

zephyr

CWE

CWE-476

NULL Pointer Dereference

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