CVE-2024-46774

In the Linux kernel, the following vulnerability has been resolved: powerpc/rtas: Prevent Spectre v1 gadget construction in sys_rtas() Smatch warns: arch/powerpc/kernel/rtas.c:1932 __do_sys_rtas() warn: potential spectre issue 'args.args' [r] (local cap) The 'nargs' and 'nret' locals come directly from a user-supplied buffer and are used as indexes into a small stack-based array and as inputs to copy_to_user() after they are subject to bounds checks. Use array_index_nospec() after the bounds checks to clamp these values for speculative execution.

CVSS v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.2

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/0974d03eb479384466d828d65637814bee6b26d7	Patch
https://git.kernel.org/stable/c/1f1feff02e9da0dd0cdb195c428c42b5f9b6c771
https://git.kernel.org/stable/c/68d8156480940b79227d58865ec5d2947b9384a8	Patch
https://git.kernel.org/stable/c/a262c2dc833f2fe1bd5c53a4d899e7077d3b1da9
https://git.kernel.org/stable/c/b137af795399d8b657bad1646c18561530f35ed1
https://git.kernel.org/stable/c/d2834ff1d9641a8695a09ea79cd901c7b6d4d05f
https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html

Configurations

Configuration 1 (hide)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2024-09-18 08:15

Updated : 2025-11-03 20:16

NVD link : CVE-2024-46774

Mitre link : CVE-2024-46774

CVE.ORG link : CVE-2024-46774

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-787

Out-of-bounds Write

{"id": "CVE-2024-46774", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.1, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 5.2, "exploitabilityScore": 1.8}]}, "published": "2024-09-18T08:15:05.180", "references": [{"url": "https://git.kernel.org/stable/c/0974d03eb479384466d828d65637814bee6b26d7", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/1f1feff02e9da0dd0cdb195c428c42b5f9b6c771", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/68d8156480940b79227d58865ec5d2947b9384a8", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a262c2dc833f2fe1bd5c53a4d899e7077d3b1da9", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b137af795399d8b657bad1646c18561530f35ed1", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/d2834ff1d9641a8695a09ea79cd901c7b6d4d05f", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html", "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-787"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/rtas: Prevent Spectre v1 gadget construction in sys_rtas()\n\nSmatch warns:\n\n arch/powerpc/kernel/rtas.c:1932 __do_sys_rtas() warn: potential\n spectre issue 'args.args' [r] (local cap)\n\nThe 'nargs' and 'nret' locals come directly from a user-supplied\nbuffer and are used as indexes into a small stack-based array and as\ninputs to copy_to_user() after they are subject to bounds checks.\n\nUse array_index_nospec() after the bounds checks to clamp these values\nfor speculative execution."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: powerpc/rtas: Impedir la construcci\u00f3n del gadget Spectre v1 en sys_rtas() Smatch advierte: arch/powerpc/kernel/rtas.c:1932 __do_sys_rtas() advierte: posible problema de Spectre 'args.args' [r] (cap local) Las variables locales 'nargs' y 'nret' provienen directamente de un b\u00fafer proporcionado por el usuario y se usan como \u00edndices en una peque\u00f1a matriz basada en pila y como entradas para copy_to_user() despu\u00e9s de que est\u00e9n sujetas a verificaciones de l\u00edmites. Utilice array_index_nospec() despu\u00e9s de las verificaciones de l\u00edmites para fijar estos valores para la ejecuci\u00f3n especulativa."}], "lastModified": "2025-11-03T20:16:31.937", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "75C6119D-9E8D-431D-813F-FE84579072CB", "versionEndExcluding": "6.10.10"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}