CVE-2024-46761

In the Linux kernel, the following vulnerability has been resolved: pci/hotplug/pnv_php: Fix hotplug driver crash on Powernv The hotplug driver for powerpc (pci/hotplug/pnv_php.c) causes a kernel crash when we try to hot-unplug/disable the PCIe switch/bridge from the PHB. The crash occurs because although the MSI data structure has been released during disable/hot-unplug path and it has been assigned with NULL, still during unregistration the code was again trying to explicitly disable the MSI which causes the NULL pointer dereference and kernel crash. The patch fixes the check during unregistration path to prevent invoking pci_disable_msi/msix() since its data structure is already freed.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/335e35b748527f0c06ded9eebb65387f60647fda	Patch
https://git.kernel.org/stable/c/438d522227374042b5c8798f8ce83bbe479dca4d	Patch
https://git.kernel.org/stable/c/4eb4085c1346d19d4a05c55246eb93e74e671048	Patch
https://git.kernel.org/stable/c/b82d4d5c736f4fd2ed224c35f554f50d1953d21e	Patch
https://git.kernel.org/stable/c/bc1faed19db95abf0933b104910a3fb01b138f59	Patch
https://git.kernel.org/stable/c/bfc44075b19740d372f989f21dd03168bfda0689	Patch
https://git.kernel.org/stable/c/c0d8094dc740cfacf3775bbc6a1c4720459e8de4	Patch
https://git.kernel.org/stable/c/c4c681999d385e28f84808bbf3a85ea8e982da55	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::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

No history.

Information

Published : 2024-09-18 08:15

Updated : 2024-09-23 16:06

NVD link : CVE-2024-46761

Mitre link : CVE-2024-46761

CVE.ORG link : CVE-2024-46761

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-476

NULL Pointer Dereference

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El fallo se produce porque, aunque la estructura de datos MSI se ha liberado durante la ruta de deshabilitaci\u00f3n/desconexi\u00f3n en caliente y se le ha asignado NULL, a\u00fan durante la anulaci\u00f3n del registro el c\u00f3digo estaba intentando de nuevo deshabilitar expl\u00edcitamente el MSI, lo que provoca la desreferencia del puntero NULL y el fallo del kernel. El parche corrige la comprobaci\u00f3n durante la ruta de anulaci\u00f3n del registro para evitar invocar pci_disable_msi/msix() ya que su estructura de datos ya est\u00e1 liberada."}], "lastModified": "2024-09-23T16:06:58.397", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "29162FB8-5FA4-4DC4-86CE-5EB0CAEEF2F3", "versionEndExcluding": "4.19.322"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6265A402-9C3C-438F-BFC5-4194B2568B85", "versionEndExcluding": "5.4.284", "versionStartIncluding": "4.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "864FC17C-501A-4823-A643-6F35D65D8A97", "versionEndExcluding": "5.10.226", "versionStartIncluding": "5.5"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "043405A4-25FE-45D4-A7BB-2A0C3B7D17C1", "versionEndExcluding": "5.15.167", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6B1A95FC-7E7E-428B-BB59-F76640C652AE", "versionEndExcluding": "6.1.110", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E4529134-BAC4-4776-840B-304009E181A0", "versionEndExcluding": "6.6.51", "versionStartIncluding": "6.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "ACDEE48C-137A-4731-90D0-A675865E1BED", "versionEndExcluding": "6.10.10", "versionStartIncluding": "6.7"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}