Threats Tagged 'cve-2026-19735'
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Threats Tagged 'cve-2026-19735'
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0 CVE-2026-19735 is a medium-severity vulnerability in the Zephyr project's TCP initial sequence number (ISN) generation. The vulnerability arises when the cryptographic random source fails during boot, causing the secret key used for ISN calculation to remain all zeros. This leads to predictable TCP ISNs, enabling off-path attackers to spoof TCP connections or inject/reset data blindly. The issue affects Zephyr versions from 3.7.0 through 4.4.2. A fix has been implemented to ensure key generation only latches on success and falls back to a less secure but safer random method if the cryptographic source fails. Join the discussion | CVE Database V5 | 10/11/2026, 17:14:56 UTC Added: 10/11/2026, 17:34:03 UTC |
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