CVE-2026-5590— net: ip/tcp: Null pointer dereference can be triggered by a race condition
Quick assessment
Affected
zephyrproject-rtos Zephyr
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Zephyr是Zephyr开源的一个可扩展的实时操作系统 (RTOS)。 Zephyr存在安全漏洞，该漏洞源于TCP连接拆除期间的竞争条件，可能导致空指针取消引用和系统崩溃。
Possible ATT&CK Techniques 1 AI
T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2026-5590
Vulnerability Information
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Vulnerability Title
net: ip/tcp: Null pointer dereference can be triggered by a race condition
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
Zephyr 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Zephyr是Zephyr开源的一个可扩展的实时操作系统 (RTOS)。 Zephyr存在安全漏洞，该漏洞源于TCP连接拆除期间的竞争条件，可能导致空指针取消引用和系统崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| zephyrproject-rtos | Zephyr | * ~ 4.3 | - |
|
II. Public POCs for CVE-2026-5590
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-5590 (1)
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V. Comments for CVE-2026-5590
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