spectre v2

Spectre v2 is a class of speculative-execution vulnerabilities in modern CPUs, and this tag collects coverage of how it continues to evolve years after the original disclosure. The most recent item examines Branch Target Reuse, a Spectre v2 variant aimed at just-in-time compilers, which researchers demonstrated by recovering a root password hash from an Intel machine running Linux. The coverage notes that the Linux kernel already carries fixes and that two CVEs were assigned, while the underlying hardware behavior remains difficult to eliminate. Together these posts track Spectre v2 research, mitigation work, and the practical patching questions that follow for Windows and Linux administrators.