CVE-2024-50122

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The latter need to take the rescan lock when adding devices or\nwe may end up in an undefined state having two incompletely added devices\nand hit the following crash when trying to remove the device over sysfs:\n\n Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000\n Internal error: Oops: 0000000096000004 [#1] SMP\n Call trace:\n __pi_strlen+0x14/0x150\n kernfs_find_ns+0x80/0x13c\n kernfs_remove_by_name_ns+0x54/0xf0\n sysfs_remove_bin_file+0x24/0x34\n pci_remove_resource_files+0x3c/0x84\n pci_remove_sysfs_dev_files+0x28/0x38\n pci_stop_bus_device+0x8c/0xd8\n pci_stop_bus_device+0x40/0xd8\n pci_stop_and_remove_bus_device_locked+0x28/0x48\n remove_store+0x70/0xb0\n dev_attr_store+0x20/0x38\n sysfs_kf_write+0x58/0x78\n kernfs_fop_write_iter+0xe8/0x184\n vfs_write+0x2dc/0x308\n ksys_write+0x7c/0xec"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: PCI: Mantener el bloqueo de rescaneo mientras se agregan dispositivos durante la sonda del host. Desde que se agreg\u00f3 el c\u00f3digo de control de energ\u00eda PCI, podemos terminar con una ejecuci\u00f3n entre el dispositivo de la plataforma pwrctl que vuelve a escanear el bus y las funciones de sonda del controlador del host. Estos \u00faltimos deben tomar el bloqueo de rescan al agregar dispositivos o podemos terminar en un estado indefinido con dos dispositivos agregados de forma incompleta y encontrar el siguiente bloqueo al intentar eliminar el dispositivo a trav\u00e9s de sysfs: No se puede manejar la desreferencia del puntero NULL del kernel en la direcci\u00f3n virtual 0000000000000000 Error interno: Oops: 0000000096000004 [#1] Rastreo de llamadas SMP: __pi_strlen+0x14/0x150 kernfs_find_ns+0x80/0x13c kernfs_remove_by_name_ns+0x54/0xf0 sysfs_remove_bin_file+0x24/0x34 pci_remove_resource_files+0x3c/0x84 pci_remove_sysfs_dev_files+0x28/0x38 pci_stop_bus_device+0x8c/0xd8 pci_stop_bus_device+0x40/0xd8 pci_stop_and_remove_bus_device_locked+0x28/0x48 remove_store+0x70/0xb0 dev_attr_store+0x20/0x38 sysfs_kf_write+0x58/0x78 kernfs_fop_write_iter+0xe8/0x184 vfs_write+0x2dc/0x308 ksys_write+0x7c/0xec"}], "id": "CVE-2024-50122", "lastModified": "2026-06-17T08:03:38.750", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-50122", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-10-01T20:21:40.173055Z", "version": "2.0.3"}}]}, "published": "2024-11-05T18:15:15.210", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1d59d474e1cb7d4fdf87dfaf96f44647f13ea590"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d4f38a0e7cc94615f63cf7765ca117e5cc2773ae"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-476"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: PCI: Hold rescan lock while adding devices during host probe", "id": "2323903", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2323903"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nPCI: Hold rescan lock while adding devices during host probe\nSince adding the PCI power control code, we may end up with a race between\nthe pwrctl platform device rescanning the bus and host controller probe\nfunctions. The latter need to take the rescan lock when adding devices or\nwe may end up in an undefined state having two incompletely added devices\nand hit the following crash when trying to remove the device over sysfs:\nUnable to handle kernel NULL pointer dereference at virtual address 0000000000000000\nInternal error: Oops: 0000000096000004 [#1] SMP\nCall trace:\n__pi_strlen+0x14/0x150\nkernfs_find_ns+0x80/0x13c\nkernfs_remove_by_name_ns+0x54/0xf0\nsysfs_remove_bin_file+0x24/0x34\npci_remove_resource_files+0x3c/0x84\npci_remove_sysfs_dev_files+0x28/0x38\npci_stop_bus_device+0x8c/0xd8\npci_stop_bus_device+0x40/0xd8\npci_stop_and_remove_bus_device_locked+0x28/0x48\nremove_store+0x70/0xb0\ndev_attr_store+0x20/0x38\nsysfs_kf_write+0x58/0x78\nkernfs_fop_write_iter+0xe8/0x184\nvfs_write+0x2dc/0x308\nksys_write+0x7c/0xec"], "name": "CVE-2024-50122", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-11-05T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-50122\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-50122\nhttps://lore.kernel.org/linux-cve-announce/2024110556-CVE-2024-50122-c520@gregkh/T"], "threat_severity": "Moderate"}

{}