CVE-2024-38667

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.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/0c1f28c32a194303da630fca89481334b9547b80	Mailing List Patch
https://git.kernel.org/stable/c/3090c06d50eaa91317f84bf3eac4c265e6cb8d44	Mailing List Patch
https://git.kernel.org/stable/c/a638b0461b58aa3205cd9d5f14d6f703d795b4af	Mailing List Patch
https://git.kernel.org/stable/c/ea22d4195cca13d5fdbc4d6555a2dfb8a7867a9e	Mailing List Patch
https://git.kernel.org/stable/c/0c1f28c32a194303da630fca89481334b9547b80	Mailing List Patch
https://git.kernel.org/stable/c/3090c06d50eaa91317f84bf3eac4c265e6cb8d44	Mailing List Patch
https://git.kernel.org/stable/c/a638b0461b58aa3205cd9d5f14d6f703d795b4af	Mailing List Patch
https://git.kernel.org/stable/c/ea22d4195cca13d5fdbc4d6555a2dfb8a7867a9e	Mailing List Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:6.10.0:rc1::::::

History

21 Nov 2024, 09:26

Type	Values Removed	Values Added
References	~~() https://git.kernel.org/stable/c/0c1f28c32a194303da630fca89481334b9547b80 - Mailing List, Patch~~	() https://git.kernel.org/stable/c/0c1f28c32a194303da630fca89481334b9547b80 - Mailing List, Patch
References	~~() https://git.kernel.org/stable/c/3090c06d50eaa91317f84bf3eac4c265e6cb8d44 - Mailing List, Patch~~	() https://git.kernel.org/stable/c/3090c06d50eaa91317f84bf3eac4c265e6cb8d44 - Mailing List, Patch
References	~~() https://git.kernel.org/stable/c/a638b0461b58aa3205cd9d5f14d6f703d795b4af - Mailing List, Patch~~	() https://git.kernel.org/stable/c/a638b0461b58aa3205cd9d5f14d6f703d795b4af - Mailing List, Patch
References	~~() https://git.kernel.org/stable/c/ea22d4195cca13d5fdbc4d6555a2dfb8a7867a9e - Mailing List, Patch~~	() https://git.kernel.org/stable/c/ea22d4195cca13d5fdbc4d6555a2dfb8a7867a9e - Mailing List, Patch

26 Jun 2024, 13:53

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.8
Summary		(es) En el kernel de Linux, se resolvió la siguiente vulnerabilidad: riscv: evita la corrupción de pt_regs para subprocesos inactivos secundarios La parte superior de la pila de subprocesos del kernel debe reservarse para pt_regs. Sin embargo, este no es el caso de los subprocesos inactivos de los corazones de arranque secundarios. Sus pilas se superponen con sus pt_regs, por lo que ambos pueden corromperse. Se ha solucionado un problema similar para el corazón principal; consulte c7cdd96eca28 ("riscv: evite la corrupción de la pila reservando task_pt_regs(p) anticipadamente"). Sin embargo, esa solución no se propagó a los corazones secundarios. El problema se ha observado en algunas pruebas de conexión en caliente de CPU con V habilitado. La función smp_callin almacenó varios registros en la pila, corrompiendo la parte superior de la estructura pt_regs, incluido el campo de estado. Como resultado, el kernel intentó guardar o restaurar el contexto V inexistente.
CPE		cpe:2.3:o:linux:linux_kernel:6.10.0:rc1:::::: cpe:2.3:o:linux:linux_kernel::::::::
First Time		Linux Linux linux Kernel
References	~~() https://git.kernel.org/stable/c/0c1f28c32a194303da630fca89481334b9547b80 -~~	() https://git.kernel.org/stable/c/0c1f28c32a194303da630fca89481334b9547b80 - Mailing List, Patch
References	~~() https://git.kernel.org/stable/c/3090c06d50eaa91317f84bf3eac4c265e6cb8d44 -~~	() https://git.kernel.org/stable/c/3090c06d50eaa91317f84bf3eac4c265e6cb8d44 - Mailing List, Patch
References	~~() https://git.kernel.org/stable/c/a638b0461b58aa3205cd9d5f14d6f703d795b4af -~~	() https://git.kernel.org/stable/c/a638b0461b58aa3205cd9d5f14d6f703d795b4af - Mailing List, Patch
References	~~() https://git.kernel.org/stable/c/ea22d4195cca13d5fdbc4d6555a2dfb8a7867a9e -~~	() https://git.kernel.org/stable/c/ea22d4195cca13d5fdbc4d6555a2dfb8a7867a9e - Mailing List, Patch
CWE		CWE-787

24 Jun 2024, 14:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2024-06-24 14:15

Updated : 2024-11-21 09:26

NVD link : CVE-2024-38667

Mitre link : CVE-2024-38667

CVE.ORG link : CVE-2024-38667

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-787

Out-of-bounds Write

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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."}, {"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. Sin embargo, este no es el caso de los subprocesos inactivos de los corazones de arranque secundarios. Sus pilas se superponen con sus pt_regs, por lo que ambos pueden corromperse. Se ha solucionado un problema similar para el coraz\u00f3n principal; consulte c7cdd96eca28 (\"riscv: evite la corrupci\u00f3n de la pila reservando task_pt_regs(p) anticipadamente\"). Sin embargo, esa soluci\u00f3n no se propag\u00f3 a los corazones secundarios. El problema se ha observado en algunas pruebas de conexi\u00f3n en caliente de CPU con V habilitado. La funci\u00f3n smp_callin almacen\u00f3 varios registros en la pila, corrompiendo la parte superior de la estructura pt_regs, incluido el campo de estado. 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7.8 /10