CVE-2026-5590

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.

PUBLISHED Reserved 2026-04-05 | Published 2026-04-05 | Updated 2026-04-06 | Assigner zephyr

Problem types

NULL Pointer Dereference

Product status

References

github.com/...zephyr/security/advisories/GHSA-4vqm-pw24-g9jp

cve.org (CVE-2026-5590)

nvd.nist.gov (CVE-2026-5590)

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