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Tracker / CVE-2024-38667

CVE-2024-38667

Alta 7.8

In the Linux kernel, the following vulnerability has been resolved: riscv: prevent pt_regs corruption for secondary idle threads Top of the kernel thread stack should be reserved for pt_regs. However this is not the case for the idle threads of the secondary boot harts. Their stacks overlap with their pt_regs, so both may get corrupted. Similar issue has been fixed for the primary hart, see c7cdd96eca28 ("riscv: prevent stack corruption by reserving task_pt_regs(p) early"). However that fix was not propagated to the secondary harts. The problem has been noticed in some CPU hotplug tests with V enabled. The function smp_callin stored several registers on stack, corrupting top of pt_regs structure including status field. As a result, kernel attempted to save or restore inexistent V context.

Prodotti e versioni affette

linux linux_kernel
linux linux_kernel · 5.7 → 6.1.93
linux linux_kernel · 6.2 → 6.6.33
linux linux_kernel · 6.7 → 6.9.4

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