CVE-2024-26893

{"id": "CVE-2024-26893", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2024-04-17T11:15:10.577", "references": [{"url": "https://git.kernel.org/stable/c/0d276d9f335f41d6524258d58c0c0241ef9a83a4", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/857f56db8c3a71f9871922b6984ff74ad588cb2c", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/8ffaa17ccb1eb1b65cf85db63225a3581c303773", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ead445dd3d681020af333649a27306160eee761d", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/f1d71576d2c9ec8fdb822173fa7f3de79475e9bd", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/0d276d9f335f41d6524258d58c0c0241ef9a83a4", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/857f56db8c3a71f9871922b6984ff74ad588cb2c", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/8ffaa17ccb1eb1b65cf85db63225a3581c303773", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/ead445dd3d681020af333649a27306160eee761d", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/f1d71576d2c9ec8fdb822173fa7f3de79475e9bd", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-415"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: arm_scmi: Fix double free in SMC transport cleanup path\n\nWhen the generic SCMI code tears down a channel, it calls the chan_free\ncallback function, defined by each transport. Since multiple protocols\nmight share the same transport_info member, chan_free() might want to\nclean up the same member multiple times within the given SCMI transport\nimplementation. In this case, it is SMC transport. This will lead to a NULL\npointer dereference at the second time:\n\n | scmi_protocol scmi_dev.1: Enabled polling mode TX channel - prot_id:16\n | arm-scmi firmware:scmi: SCMI Notifications - Core Enabled.\n | arm-scmi firmware:scmi: unable to communicate with SCMI\n | Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000\n | Mem abort info:\n | ESR = 0x0000000096000004\n | EC = 0x25: DABT (current EL), IL = 32 bits\n | SET = 0, FnV = 0\n | EA = 0, S1PTW = 0\n | FSC = 0x04: level 0 translation fault\n | Data abort info:\n | ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000\n | CM = 0, WnR = 0, TnD = 0, TagAccess = 0\n | GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0\n | user pgtable: 4k pages, 48-bit VAs, pgdp=0000000881ef8000\n | [0000000000000000] pgd=0000000000000000, p4d=0000000000000000\n | Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP\n | Modules linked in:\n | CPU: 4 PID: 1 Comm: swapper/0 Not tainted 6.7.0-rc2-00124-g455ef3d016c9-dirty #793\n | Hardware name: FVP Base RevC (DT)\n | pstate: 61400009 (nZCv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--)\n | pc : smc_chan_free+0x3c/0x6c\n | lr : smc_chan_free+0x3c/0x6c\n | Call trace:\n | smc_chan_free+0x3c/0x6c\n | idr_for_each+0x68/0xf8\n | scmi_cleanup_channels.isra.0+0x2c/0x58\n | scmi_probe+0x434/0x734\n | platform_probe+0x68/0xd8\n | really_probe+0x110/0x27c\n | __driver_probe_device+0x78/0x12c\n | driver_probe_device+0x3c/0x118\n | __driver_attach+0x74/0x128\n | bus_for_each_dev+0x78/0xe0\n | driver_attach+0x24/0x30\n | bus_add_driver+0xe4/0x1e8\n | driver_register+0x60/0x128\n | __platform_driver_register+0x28/0x34\n | scmi_driver_init+0x84/0xc0\n | do_one_initcall+0x78/0x33c\n | kernel_init_freeable+0x2b8/0x51c\n | kernel_init+0x24/0x130\n | ret_from_fork+0x10/0x20\n | Code: f0004701 910a0021 aa1403e5 97b91c70 (b9400280)\n | ---[ end trace 0000000000000000 ]---\n\nSimply check for the struct pointer being NULL before trying to access\nits members, to avoid this situation.\n\nThis was found when a transport doesn't really work (for instance no SMC\nservice), the probe routines then tries to clean up, and triggers a crash."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: firmware: arm_scmi: Correcci\u00f3n de doble liberaci\u00f3n en la ruta de limpieza del transporte SMC Cuando el c\u00f3digo SCMI gen\u00e9rico destruye un canal, llama a la funci\u00f3n de devoluci\u00f3n de llamada chan_free, definida por cada transporte. Dado que varios protocolos pueden compartir el mismo miembro transport_info, es posible que chan_free() desee limpiar el mismo miembro varias veces dentro de la implementaci\u00f3n de transporte SCMI determinada. En este caso se trata de transporte SMC. Esto dar\u00e1 lugar a una desreferencia del puntero NULL la segunda vez: | scmi_protocol scmi_dev.1: Canal TX en modo de sondeo habilitado - prot_id:16 | firmware arm-scmi: scmi: Notificaciones SCMI: n\u00facleo habilitado. | firmware arm-scmi: scmi: no se puede comunicar con SCMI | No se puede manejar la desreferencia del puntero NULL del kernel en la direcci\u00f3n virtual 0000000000000000 | Informaci\u00f3n de cancelaci\u00f3n de memoria: | ESR = 0x0000000096000004 | EC = 0x25: DABT (EL actual), IL = 32 bits | CONJUNTO = 0, FnV = 0 | EA = 0, S1PTW = 0 | FSC = 0x04: error de traducci\u00f3n de nivel 0 | Informaci\u00f3n de cancelaci\u00f3n de datos: | ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000 | CM = 0, WnR = 0, TnD = 0, Acceso a etiquetas = 0 | GCS = 0, Superposici\u00f3n = 0, DirtyBit = 0, Xs = 0 | pgtable de usuario: p\u00e1ginas de 4k, VA de 48 bits, pgdp=0000000881ef8000 | [0000000000000000] pgd=0000000000000000, p4d=0000000000000000 | Error interno: Ups: 0000000096000004 [#1] SMP ANTICIPADO | M\u00f3dulos enlazados en: | CPU: 4 PID: 1 Comunicaciones: swapper/0 No contaminado 6.7.0-rc2-00124-g455ef3d016c9-dirty #793 | Nombre del hardware: FVP Base RevC (DT) | pstate: 61400009 (nZCv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--) | ordenador personal: smc_chan_free+0x3c/0x6c | lr: smc_chan_free+0x3c/0x6c | Rastreo de llamadas: | smc_chan_free+0x3c/0x6c | idr_for_each+0x68/0xf8 | scmi_cleanup_channels.isra.0+0x2c/0x58 | scmi_probe+0x434/0x734 | sonda_plataforma+0x68/0xd8 | realmente_probe+0x110/0x27c | __driver_probe_device+0x78/0x12c | dispositivo_sonda_controlador+0x3c/0x118 | __driver_attach+0x74/0x128 | bus_for_each_dev+0x78/0xe0 | driver_attach+0x24/0x30 | bus_add_driver+0xe4/0x1e8 | registro_controlador+0x60/0x128 | __platform_driver_register+0x28/0x34 | scmi_driver_init+0x84/0xc0 | do_one_initcall+0x78/0x33c | kernel_init_freeable+0x2b8/0x51c | kernel_init+0x24/0x130 | ret_from_fork+0x10/0x20 | C\u00f3digo: f0004701 910a0021 aa1403e5 97b91c70 (b9400280) | ---[ end trace 0000000000000000 ]--- Simplemente verifique que el puntero de estructura sea NULL antes de intentar acceder a sus miembros, para evitar esta situaci\u00f3n. Esto se encontr\u00f3 cuando un transporte realmente no funciona (por ejemplo, sin servicio SMC), las rutinas de la sonda intentan limpiarse y provocan un bloqueo."}], "lastModified": "2025-01-27T15:14:28.090", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E8D30B4C-D66E-4ECB-8103-8CD9DFE724AA", "versionEndExcluding": "6.1.83", "versionStartIncluding": "5.8"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E00814DC-0BA7-431A-9926-80FEB4A96C68", "versionEndExcluding": "6.6.23", "versionStartIncluding": "6.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9B95D3A6-E162-47D5-ABFC-F3FA74FA7CFD", "versionEndExcluding": "6.7.11", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "543A75FF-25B8-4046-A514-1EA8EDD87AB1", "versionEndExcluding": "6.8.2", "versionStartIncluding": "6.8"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}