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In the last one, the interrupt was not properly\nreleased on module remove.\n\nIt was not freed because the flag irqs_hooked was not set during\ninitialization in the case of using legacy IRQ.\n\nExample of (trimmed) trace during module remove without this fix:\n\nremove_proc_entry: removing non-empty directory 'irq/125', leaking at least '0000:3b:00.1'\nWARNING: CPU: 39 PID: 3658 at fs/proc/generic.c:715 remove_proc_entry+0x15c/0x170\n...trimmed...\nCall Trace:\n unregister_irq_proc+0xe3/0x100\n free_desc+0x29/0x70\n irq_free_descs+0x47/0x70\n mp_unmap_irq+0x58/0x60\n acpi_unregister_gsi_ioapic+0x2a/0x40\n acpi_pci_irq_disable+0x78/0xb0\n pci_disable_device+0xd1/0x100\n efx_pci_remove+0xa1/0x1e0 [sfc]\n pci_device_remove+0x38/0xa0\n __device_release_driver+0x177/0x230\n driver_detach+0xcb/0x110\n bus_remove_driver+0x58/0xd0\n pci_unregister_driver+0x2a/0xb0\n efx_exit_module+0x24/0xf40 [sfc]\n __do_sys_delete_module.constprop.0+0x171/0x280\n ? exit_to_user_mode_prepare+0x83/0x1d0\n do_syscall_64+0x3d/0x80\n entry_SYSCALL_64_after_hwframe+0x44/0xae\nRIP: 0033:0x7f9f9385800b\n...trimmed..."}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: net:sfc: corrige irq no liberado en modo irq heredado. El controlador SFC se puede configurar mediante modparam para que funcione usando interrupciones MSI-X, MSI o IRQ heredadas. En el \u00faltimo, la interrupci\u00f3n no se liber\u00f3 correctamente al eliminar el m\u00f3dulo. No se liber\u00f3 porque el indicador irqs_hooked no se estableci\u00f3 durante la inicializaci\u00f3n en el caso de utilizar IRQ heredado. Ejemplo de seguimiento (recortado) durante la eliminaci\u00f3n del m\u00f3dulo sin esta soluci\u00f3n: remove_proc_entry: eliminando el directorio no vac\u00edo 'irq/125', filtrando al menos '0000:3b:00.1' ADVERTENCIA: CPU: 39 PID: 3658 en fs/proc/generic .c:715 remove_proc_entry+0x15c/0x170 ...recortado... Seguimiento de llamadas: unregister_irq_proc+0xe3/0x100 free_desc+0x29/0x70 irq_free_descs+0x47/0x70 mp_unmap_irq+0x58/0x60 acpi_unregister_gsi_ioapic+0x2a/0x 40 acpi_pci_irq_disable+0x78/0xb0 pci_disable_device +0xd1/0x100 efx_pci_remove+0xa1/0x1e0 [sfc] pci_device_remove+0x38/0xa0 __device_release_driver+0x177/0x230 driver_detach+0xcb/0x110 bus_remove_driver+0x58/0xd0 pci_unregister_driver+0x2a/0 xb0 efx_exit_module+0x24/0xf40 [sfc] __do_sys_delete_module.constprop.0 +0x171/0x280 ? exit_to_user_mode_prepare+0x83/0x1d0 do_syscall_64+0x3d/0x80 Entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f9f9385800b ...recortado..."}], "id": "CVE-2021-47283", "lastModified": "2024-12-26T20:49:20.487", "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"}]}, "published": "2024-05-21T15:15:16.503", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/81c4d1d83f88e15b26f4522a35cba6ffd8c5dfdd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8d717c9135a3340ae62d1699484850bfb4112b0c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8f03eeb6e0a0a0b8d617ee0a4bce729e47130036"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/81c4d1d83f88e15b26f4522a35cba6ffd8c5dfdd"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8d717c9135a3340ae62d1699484850bfb4112b0c"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8f03eeb6e0a0a0b8d617ee0a4bce729e47130036"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-772"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: net:sfc: fix non-freed irq in legacy irq mode", "id": "2282514", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2282514"}, "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-665|CWE-404|CWE-401)", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet:sfc: fix non-freed irq in legacy irq mode\nSFC driver can be configured via modparam to work using MSI-X, MSI or\nlegacy IRQ interrupts. In the last one, the interrupt was not properly\nreleased on module remove.\nIt was not freed because the flag irqs_hooked was not set during\ninitialization in the case of using legacy IRQ.\nExample of (trimmed) trace during module remove without this fix:\nremove_proc_entry: removing non-empty directory 'irq/125', leaking at least '0000:3b:00.1'\nWARNING: CPU: 39 PID: 3658 at fs/proc/generic.c:715 remove_proc_entry+0x15c/0x170\n...trimmed...\nCall Trace:\nunregister_irq_proc+0xe3/0x100\nfree_desc+0x29/0x70\nirq_free_descs+0x47/0x70\nmp_unmap_irq+0x58/0x60\nacpi_unregister_gsi_ioapic+0x2a/0x40\nacpi_pci_irq_disable+0x78/0xb0\npci_disable_device+0xd1/0x100\nefx_pci_remove+0xa1/0x1e0 [sfc]\npci_device_remove+0x38/0xa0\n__device_release_driver+0x177/0x230\ndriver_detach+0xcb/0x110\nbus_remove_driver+0x58/0xd0\npci_unregister_driver+0x2a/0xb0\nefx_exit_module+0x24/0xf40 [sfc]\n__do_sys_delete_module.constprop.0+0x171/0x280\n? exit_to_user_mode_prepare+0x83/0x1d0\ndo_syscall_64+0x3d/0x80\nentry_SYSCALL_64_after_hwframe+0x44/0xae\nRIP: 0033:0x7f9f9385800b\n...trimmed..."], "name": "CVE-2021-47283", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "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": "2024-05-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47283\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47283\nhttps://lore.kernel.org/linux-cve-announce/2024052154-CVE-2021-47283-6ea6@gregkh/T"], "threat_severity": "Low"}