tcpsecurity

  1. Linux TCP Hardening for CVE-2026-23247: Restoring Port-Based Entropy

    Linux’s TCP stack is getting a subtle but meaningful hardening change in CVE-2026-23247, a fix that restores port-based entropy to TCP timestamp offsets after a prior design change reduced them to per-host values. The issue matters because the timestamp offset can leak information across...
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    • cve-2026-23247 linux kernel syn cookies tcpsecurity
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    • Forum: Security Alerts

  2. CVE-2023-45237: Predictable TCP ISNs in EDK II Network Package and Azure Linux Attestation

    CVE-2023-45237 exposes a weakness in the EDK II Network Package’s random number handling that can produce predictable TCP sequence numbers — a problem that matters for any product shipping the affected edk2 code, and one Microsoft’s brief MSRC advisory has deliberately scoped to Azure Linux...
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    • azure linux edk2 network tcpsecurity vulnerability patching
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    • Forum: Security Alerts

  3. AA20-182A: EINSTEIN Data Trends – 30-day Lookback

    Original release date: June 30, 2020 Summary Cybersecurity and Infrastructure Security Agency (CISA) analysts have compiled the top detection signatures that have been the most active over the month of May in our national Intrusion Detection System (IDS), known as EINSTEIN. This information is...
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    • analysis cisa compartments cybersecurity detection einstein ids kovter malware mitigation netsupport network rat security snort tcpsecurity threats update vulnerability xmrig
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    • Forum: Security Alerts