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Spectre bug is back, this time to haunt JIT engines

Summary

Security

The researchers found this novel Spectre form can be conjured from code left in JIT engines including Linux cBPF, Oracle GraalVM, and Mozilla SpiderMonkey. The Branch Target Reuse paper has been accepted for publication at the ACM Conference on Computer and Communications Security (CCS) 2026 Netherlands.

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The Registeras they published this story 11

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