cve-2024-38667
Vulnerability from cvelistv5
Published
2024-06-24 13:52
Modified
2024-12-19 09:06
Severity ?
EPSS score ?
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
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However\nthis is not the case for the idle threads of the secondary boot harts.\nTheir stacks overlap with their pt_regs, so both may get corrupted.\n\nSimilar issue has been fixed for the primary hart, see c7cdd96eca28\n(\"riscv: prevent stack corruption by reserving task_pt_regs(p) early\").\nHowever that fix was not propagated to the secondary harts. The problem\nhas been noticed in some CPU hotplug tests with V enabled. The function\nsmp_callin stored several registers on stack, corrupting top of pt_regs\nstructure including status field. As a result, kernel attempted to save\nor restore inexistent V context." } ], "providerMetadata": { "dateUpdated": "2024-12-19T09:06:23.345Z", "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux" }, "references": [ { "url": "https://git.kernel.org/stable/c/ea22d4195cca13d5fdbc4d6555a2dfb8a7867a9e" }, { "url": "https://git.kernel.org/stable/c/3090c06d50eaa91317f84bf3eac4c265e6cb8d44" }, { "url": "https://git.kernel.org/stable/c/0c1f28c32a194303da630fca89481334b9547b80" }, { "url": "https://git.kernel.org/stable/c/a638b0461b58aa3205cd9d5f14d6f703d795b4af" } ], "title": "riscv: prevent pt_regs corruption for secondary idle threads", "x_generator": { "engine": "bippy-5f407fcff5a0" } } }, "cveMetadata": { "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "assignerShortName": "Linux", "cveId": "CVE-2024-38667", "datePublished": "2024-06-24T13:52:25.399Z", "dateReserved": "2024-06-21T11:16:40.598Z", "dateUpdated": "2024-12-19T09:06:23.345Z", "state": "PUBLISHED" }, "dataType": "CVE_RECORD", "dataVersion": "5.1", "vulnerability-lookup:meta": { "nvd": "{\"cve\":{\"id\":\"CVE-2024-38667\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-06-24T14:15:12.790\",\"lastModified\":\"2024-11-21T09:26:35.473\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nriscv: prevent pt_regs corruption for secondary idle threads\\n\\nTop of the kernel thread stack should be reserved for pt_regs. However\\nthis is not the case for the idle threads of the secondary boot harts.\\nTheir stacks overlap with their pt_regs, so both may get corrupted.\\n\\nSimilar issue has been fixed for the primary hart, see c7cdd96eca28\\n(\\\"riscv: prevent stack corruption by reserving task_pt_regs(p) early\\\").\\nHowever that fix was not propagated to the secondary harts. The problem\\nhas been noticed in some CPU hotplug tests with V enabled. The function\\nsmp_callin stored several registers on stack, corrupting top of pt_regs\\nstructure including status field. As a result, kernel attempted to save\\nor restore inexistent V context.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: riscv: evita la corrupci\u00f3n de pt_regs para subprocesos inactivos secundarios La parte superior de la pila de subprocesos del kernel debe reservarse para pt_regs. 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Sightings
Author | Source | Type | Date |
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Nomenclature
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