Researchers describe a new Spectre v2 variant, called Branch Target Reuse (BTR), that can expose data through speculative execution. The reported risk centers on just-in-time (JIT) engines used in web browsers, language runtimes, and also in the operating system kernel.
The disclosures say BTR targets how CPUs may reuse branch targets during speculation, allowing attackers to infer or leak information from protected memory. Both outlets indicate the issue is relevant across multiple CPU architectures, including Intel, AMD, and Arm. The Hacker News piece emphasizes that the attack can succeed even with existing defenses in place, suggesting current mitigations may not fully address the new technique.
While the outlets focus on different aspects—SecurityWeek highlights the cross-vendor exposure and broad affected components, and The Hacker News stresses the Linux memory impact and that known protections do not prevent the leak—both attribute the findings to academic researchers and describe the same underlying vulnerability and affected execution contexts.
