CVE-2025-39780

{"id": "CVE-2025-39780", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}, {"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": "a8532fac7b5d27b8d62008a89593dccb6f9786ef", "lessThan": "786f6314604b34c3e7de5f733f4e08e35c448a50", "versionType": "git"}, {"status": "affected", "version": "a8532fac7b5d27b8d62008a89593dccb6f9786ef", "lessThan": "6a32cbe95029ebe21cc08349fd7ef2a3d32d2043", "versionType": "git"}, {"status": "affected", "version": "a8532fac7b5d27b8d62008a89593dccb6f9786ef", "lessThan": "ddf7233fcab6c247379d0928d46cc316ee122229", "versionType": "git"}], "programFiles": ["kernel/sched/ext.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.12"}, {"status": "unaffected", "version": "0", "lessThan": "6.12", "versionType": "semver"}, {"status": "unaffected", "version": "6.12.44", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.16.4", "versionType": "semver", "lessThanOrEqual": "6.16.*"}, {"status": "unaffected", "version": "6.17", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["kernel/sched/ext.c"], "defaultStatus": "affected"}]}], "published": "2025-09-11T17:15:43.900", "references": [{"url": "https://git.kernel.org/stable/c/6a32cbe95029ebe21cc08349fd7ef2a3d32d2043", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/786f6314604b34c3e7de5f733f4e08e35c448a50", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ddf7233fcab6c247379d0928d46cc316ee122229", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Modified", "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\nsched/ext: Fix invalid task state transitions on class switch\n\nWhen enabling a sched_ext scheduler, we may trigger invalid task state\ntransitions, resulting in warnings like the following (which can be\neasily reproduced by running the hotplug selftest in a loop):\n\n sched_ext: Invalid task state transition 0 -> 3 for fish[770]\n WARNING: CPU: 18 PID: 787 at kernel/sched/ext.c:3862 scx_set_task_state+0x7c/0xc0\n ...\n RIP: 0010:scx_set_task_state+0x7c/0xc0\n ...\n Call Trace:\n <TASK>\n scx_enable_task+0x11f/0x2e0\n switching_to_scx+0x24/0x110\n scx_enable.isra.0+0xd14/0x13d0\n bpf_struct_ops_link_create+0x136/0x1a0\n __sys_bpf+0x1edd/0x2c30\n __x64_sys_bpf+0x21/0x30\n do_syscall_64+0xbb/0x370\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nThis happens because we skip initialization for tasks that are already\ndead (with their usage counter set to zero), but we don't exclude them\nduring the scheduling class transition phase.\n\nFix this by also skipping dead tasks during class swiching, preventing\ninvalid task state transitions."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nsched/ext: Corrige transiciones de estado de tarea inv\u00e1lidas en el cambio de clase\n\nAl habilitar un planificador sched_ext, podemos desencadenar transiciones de estado de tarea inv\u00e1lidas, lo que resulta en advertencias como las siguientes (que se pueden reproducir f\u00e1cilmente ejecutando la autoprueba de hotplug en un bucle):\n\n sched_ext: Transici\u00f3n de estado de tarea inv\u00e1lida 0 -> 3 para fish[770]\n ADVERTENCIA: CPU: 18 PID: 787 en kernel/sched/ext.c:3862 scx_set_task_state+0x7c/0xc0\n ...\n RIP: 0010:scx_set_task_state+0x7c/0xc0\n ...\n Traza de Llamada:\n <TAREA>\n scx_enable_task+0x11f/0x2e0\n switching_to_scx+0x24/0x110\n scx_enable.isra.0+0xd14/0x13d0\n bpf_struct_ops_link_create+0x136/0x1a0\n __sys_bpf+0x1edd/0x2c30\n __x64_sys_bpf+0x21/0x30\n do_syscall_64+0xbb/0x370\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nEsto sucede porque omitimos la inicializaci\u00f3n para tareas que ya est\u00e1n muertas (con su contador de uso establecido en cero), pero no las excluimos durante la fase de transici\u00f3n de clase de planificaci\u00f3n.\n\nSoluciona esto tambi\u00e9n omitiendo tareas muertas durante el cambio de clase, evitando transiciones de estado de tarea inv\u00e1lidas."}], "lastModified": "2026-10-19T21:10:00.160", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "14C4B269-8787-47B5-A04C-8BFCE8F9C2D8", "versionEndExcluding": "6.12.44", "versionStartIncluding": "6.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "AFC28995-B8C3-4B68-8CB6-78E792B6629D", "versionEndExcluding": "6.16.4", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "327D22EF-390B-454C-BD31-2ED23C998A1C"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C730CD9A-D969-4A8E-9522-162AAF7C0EE9"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}