CVE-2024-38667 (GCVE-0-2024-38667)
Vulnerability from cvelistv5
Published
2024-06-24 13:52
Modified
2025-05-04 09:16
Severity ?
Summary
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: 2875fe0561569f82d0e63658ccf0d11ce7da8922
Version: 2875fe0561569f82d0e63658ccf0d11ce7da8922
Version: 2875fe0561569f82d0e63658ccf0d11ce7da8922
Version: 2875fe0561569f82d0e63658ccf0d11ce7da8922
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