CVE-2026-5590 — net: ip/tcp: Null pointer dereference can be triggered by a race condition

CVE-2026-5590

net: ip/tcp: Null pointer dereference can be triggered by a race condition PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
zephyrproject-rtos / Zephyr	affected * before 4.3.1

CWE

CWE-476

References

https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-4vqm-pw24-g9jp

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.