CVE-2025-71102

{"id": "CVE-2025-71102", "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}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5bbaf9d1fcb9be696ee9a61636ab6803556c70f2", "lessThan": "1727e8bd69103a68963a5613a0ddb6d8d37df5d3", "versionType": "git"}, {"status": "affected", "version": "5bbaf9d1fcb9be696ee9a61636ab6803556c70f2", "lessThan": "cfdf6250b63b953b1d8e60814c8ca96c6f9d1c8c", "versionType": "git"}, {"status": "affected", "version": "5bbaf9d1fcb9be696ee9a61636ab6803556c70f2", "lessThan": "57ba40b001be27786d0570dd292289df748b306b", "versionType": "git"}, {"status": "affected", "version": "5bbaf9d1fcb9be696ee9a61636ab6803556c70f2", "lessThan": "062774439d442882b44f5eab8c256ad3423ef284", "versionType": "git"}, {"status": "affected", "version": "5bbaf9d1fcb9be696ee9a61636ab6803556c70f2", "lessThan": "9ef28943471a16e4f9646bc3e8e2de148e7d8d7b", "versionType": "git"}, {"status": "affected", "version": "5bbaf9d1fcb9be696ee9a61636ab6803556c70f2", "lessThan": "a19fb3611e4c06624fc0f83ef19f4fb8d57d4751", "versionType": "git"}, {"status": "affected", "version": "5bbaf9d1fcb9be696ee9a61636ab6803556c70f2", "lessThan": "08bd4c46d5e63b78e77f2605283874bbe868ab19", "versionType": "git"}], "programFiles": ["kernel/scs.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.8"}, {"status": "unaffected", "version": "0", "lessThan": "5.8", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.248", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.198", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.160", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.120", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.64", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.3", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "6.19", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["kernel/scs.c"], "defaultStatus": "affected"}]}], "published": "2026-01-14T15:15:59.210", "references": [{"url": "https://git.kernel.org/stable/c/062774439d442882b44f5eab8c256ad3423ef284", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/08bd4c46d5e63b78e77f2605283874bbe868ab19", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/1727e8bd69103a68963a5613a0ddb6d8d37df5d3", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/57ba40b001be27786d0570dd292289df748b306b", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/9ef28943471a16e4f9646bc3e8e2de148e7d8d7b", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a19fb3611e4c06624fc0f83ef19f4fb8d57d4751", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/cfdf6250b63b953b1d8e60814c8ca96c6f9d1c8c", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscs: fix a wrong parameter in __scs_magic\n\n__scs_magic() needs a 'void *' variable, but a 'struct task_struct *' is\ngiven. 'task_scs(tsk)' is the starting address of the task's shadow call\nstack, and '__scs_magic(task_scs(tsk))' is the end address of the task's\nshadow call stack. Here should be '__scs_magic(task_scs(tsk))'.\n\nThe user-visible effect of this bug is that when CONFIG_DEBUG_STACK_USAGE\nis enabled, the shadow call stack usage checking function\n(scs_check_usage) would scan an incorrect memory range. This could lead\n\n1. **Inaccurate stack usage reporting**: The function would calculate\n wrong usage statistics for the shadow call stack, potentially showing\n incorrect value in kmsg.\n\n2. **Potential kernel crash**: If the value of __scs_magic(tsk)is\n greater than that of __scs_magic(task_scs(tsk)), the for loop may\n access unmapped memory, potentially causing a kernel panic. However,\n this scenario is unlikely because task_struct is allocated via the slab\n allocator (which typically returns lower addresses), while the shadow\n call stack returned by task_scs(tsk) is allocated via vmalloc(which\n typically returns higher addresses).\n\nHowever, since this is purely a debugging feature\n(CONFIG_DEBUG_STACK_USAGE), normal production systems should be not\nunaffected. The bug only impacts developers and testers who are actively\ndebugging stack usage with this configuration enabled."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nscs: corrige un par\u00e1metro incorrecto en __scs_magic\n\n__scs_magic() necesita una variable 'void *', pero se le da una 'struct task_struct *'. 'task_scs(tsk)' es la direcci\u00f3n de inicio de la pila de llamadas en sombra de la tarea, y '__scs_magic(task_scs(tsk))' es la direcci\u00f3n final de la pila de llamadas en sombra de la tarea. Aqu\u00ed deber\u00eda ser '__scs_magic(task_scs(tsk))'.\n\nEl efecto visible para el usuario de este error es que cuando CONFIG_DEBUG_STACK_USAGE est\u00e1 habilitado, la funci\u00f3n de comprobaci\u00f3n de uso de la pila de llamadas en sombra (scs_check_usage) escanear\u00eda un rango de memoria incorrecto. Esto podr\u00eda llevar a\n\n1. Informes de uso de pila inexactos: La funci\u00f3n calcular\u00eda estad\u00edsticas de uso incorrectas para la pila de llamadas en sombra, potencialmente mostrando un valor incorrecto en kmsg.\n\n2. Posible ca\u00edda del kernel: Si el valor de __scs_magic(tsk) es mayor que el de __scs_magic(task_scs(tsk)), el bucle for podr\u00eda acceder a memoria no mapeada, potencialmente causando un p\u00e1nico del kernel. Sin embargo, este escenario es poco probable porque task_struct se asigna a trav\u00e9s del asignador slab (que t\u00edpicamente devuelve direcciones m\u00e1s bajas), mientras que la pila de llamadas en sombra devuelta por task_scs(tsk) se asigna a trav\u00e9s de vmalloc (que t\u00edpicamente devuelve direcciones m\u00e1s altas).\n\nSin embargo, dado que esta es puramente una caracter\u00edstica de depuraci\u00f3n (CONFIG_DEBUG_STACK_USAGE), los sistemas de producci\u00f3n normales no deber\u00edan verse afectados. El error solo afecta a desarrolladores y probadores que est\u00e1n depurando activamente el uso de la pila con esta configuraci\u00f3n habilitada."}], "lastModified": "2026-06-17T10:03:40.040", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F54AC764-1B64-490B-8453-1CB63C5FFCD1", "versionEndExcluding": "5.10.248", "versionStartIncluding": "5.8.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "82159CAA-B6BA-43C6-85D8-65BDBC175A7E", "versionEndExcluding": "5.15.198", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C10CC03E-16A9-428A-B449-40D3763E15F6", "versionEndExcluding": "6.1.160", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "43C3A206-5EEE-417B-AA0F-EF8972E7A9F0", "versionEndExcluding": "6.6.120", "versionStartIncluding": "6.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "32BF4A52-377C-44ED-B5E6-7EA5D896E98B", "versionEndExcluding": "6.12.64", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2DC484D8-FB4F-4112-900F-AE333B6FE7A7", "versionEndExcluding": "6.18.3", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.8:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0E2DC66F-4A95-475F-B8B6-191DEC1E7EF6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "17B67AA7-40D6-4AFA-8459-F200F3D7CFD1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C47E4CC9-C826-4FA9-B014-7FE3D9B318B2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F71D92C0-C023-48BD-B3B6-70B638EEE298"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "13580667-0A98-40CC-B29F-D12790B91BDB"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CAD1FED7-CF48-47BF-AC7D-7B6FA3C065FC"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3EF854A1-ABB1-4E93-BE9A-44569EC76C0D"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc7:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F5DC0CA6-F0AF-4DDF-A882-3DADB9A886A7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc8:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "EB5B7DFC-C36B-45D8-922C-877569FDDF43"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}