CVE-2026-5590
net: ip/tcp: Null pointer dereference can be triggered by a race condition
- State
- Published
- Severity
- 6.4 Medium
- Published
- Apr 5, 2026
- Updated
- Oct 15, 2026
- Reserved
- Apr 5, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.4 Medium | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H | zephyr |
Weaknesses
- CWE-476 NULL Pointer Dereference
Affected Products
| Product | Versions |
|---|---|
Zephyrzephyrproject-rtos |
|
References
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