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8a302b56e6
Add detection for three speculation/security-relevant ARM64 errata families that are tracked by vendor erratum IDs rather than CVEs: Speculative AT TLB corruption (1165522/1319367/1319537/1530923), speculative unprivileged load (2966298/3117295), and MSR SSBS not self-synchronizing (3194386 and siblings). Reserves a new CVE-0001-NNNN placeholder range for vendor errata and adds a --errata <number> selector alongside --variant/--cve. CPU affection is determined per-core from (implementer, part, variant, revision) tuples read from /proc/cpuinfo, matching the kernel's MIDR ranges (including Kryo4xx Silver for erratum 1530923). Kernel mitigation detection uses the erratum-specific CONFIG_ARM64_ERRATUM_NNNN symbols, kernel image descriptor strings, and dmesg output (no sysfs for these)