CVE WATCH / VULNERABILITY DETAIL

CVE-2026-19735

MEDIUMCVSS 4.8NVD feed

Published 11 October 2026 · tracked since 12 October 2026

Description

The RFC 6528 initial-sequence-number implementation in subsys/net/ip/tcp.c derived every TCP ISN from SHA-256(unique_key || four-tuple) plus a uptime-derived offset, where unique_key is a 128-bit secret filled once by sys_csrand_get(). The return value of that call was discarded and the once guard w

References

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