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CVE-2026-19735 Predictable TCP initial sequence numbers when the RFC 6528 secret key generation fails silently in the Zephyr TCP stack

🗓️ 11 Oct 2026 17:14:56Reported by zephyrType 
cvelist
 cvelist
🔗 www.cve.org👁 7 Views

Predictable TCP initial sequence numbers in Zephyr TCP stack due to failed secret key generation.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
circl
Circl
CVE-2026-19735
11 Oct 202617:24
–circl
cve
CVE
CVE-2026-19735
11 Oct 202617:14
–cve
euvd
EUVD
EUVD-2026-97114
11 Oct 202617:14
–euvd
nvd
NVD
CVE-2026-19735
11 Oct 202618:16
–nvd
[
  {
    "vendor": "zephyrproject",
    "product": "zephyr",
    "collectionURL": "https://github.com/zephyrproject-rtos/zephyr",
    "packageName": "zephyr",
    "defaultStatus": "unaffected",
    "programFiles": [
      "subsys/net/ip/tcp.c"
    ],
    "programRoutines": [
      {
        "name": "tcp_init_isn"
      },
      {
        "name": "tcpv4_init_isn"
      },
      {
        "name": "tcpv6_init_isn"
      }
    ],
    "versions": [
      {
        "version": "3.7.0",
        "status": "affected",
        "versionType": "semver",
        "lessThanOrEqual": "4.4.2"
      }
    ]
  }
]

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