CVE - CVE-2024-38667

CVE-ID
CVE-2024-38667	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/0c1f28c32a194303da630fca89481334b9547b80 URL:https://git.kernel.org/stable/c/0c1f28c32a194303da630fca89481334b9547b80 MISC:https://git.kernel.org/stable/c/3090c06d50eaa91317f84bf3eac4c265e6cb8d44 URL:https://git.kernel.org/stable/c/3090c06d50eaa91317f84bf3eac4c265e6cb8d44 MISC:https://git.kernel.org/stable/c/a638b0461b58aa3205cd9d5f14d6f703d795b4af URL:https://git.kernel.org/stable/c/a638b0461b58aa3205cd9d5f14d6f703d795b4af MISC:https://git.kernel.org/stable/c/ea22d4195cca13d5fdbc4d6555a2dfb8a7867a9e URL:https://git.kernel.org/stable/c/ea22d4195cca13d5fdbc4d6555a2dfb8a7867a9e
Assigning CNA
kernel.org
Date Record Created
20240621	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240621)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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