CVE-2026-5590
net: ip/tcp: Null pointer dereference can be triggered by a race condition
CVSS Score
6.4
EPSS Score
0.0%
EPSS Percentile
12th
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.
| CWE | CWE-476 |
| Vendor | zephyrproject-rtos |
| Product | zephyr |
| Published | Apr 5, 2026 |
| Last Updated | Apr 6, 2026 |
Stay Ahead of the Next One
Get instant alerts for zephyrproject-rtos zephyr
Be the first to know when new medium vulnerabilities affecting zephyrproject-rtos zephyr are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
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
Affected Versions
zephyrproject-rtos / Zephyr
* ≤ 4.3