CVE-2024-56610

{"id": "CVE-2024-56610", "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": "2024-12-27T15:15:20.490", "references": [{"url": "https://git.kernel.org/stable/c/0ab4951c1473c7d1ceaf1232eb927109cd1c4859", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/59458fa4ddb47e7891c61b4a928d13d5f5b00aa0", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/889a0d3a35fdedba1c5dcb6410c95c32421680ec", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/dca4e74a918586913d251c0b359e8cc96a3883ea", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ea6588abcc15d68fdeae777ffe3dd74c02eab407", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/f4f2ef66d288ea796ddb8ecbdc2df074ab2d5f4d", "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\nkcsan: Turn report_filterlist_lock into a raw_spinlock\n\nRan Xiaokai reports that with a KCSAN-enabled PREEMPT_RT kernel, we can see\nsplats like:\n\n| BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:48\n| in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 0, name: swapper/1\n| preempt_count: 10002, expected: 0\n| RCU nest depth: 0, expected: 0\n| no locks held by swapper/1/0.\n| irq event stamp: 156674\n| hardirqs last enabled at (156673): [<ffffffff81130bd9>] do_idle+0x1f9/0x240\n| hardirqs last disabled at (156674): [<ffffffff82254f84>] sysvec_apic_timer_interrupt+0x14/0xc0\n| softirqs last enabled at (0): [<ffffffff81099f47>] copy_process+0xfc7/0x4b60\n| softirqs last disabled at (0): [<0000000000000000>] 0x0\n| Preemption disabled at:\n| [<ffffffff814a3e2a>] paint_ptr+0x2a/0x90\n| CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.11.0+ #3\n| Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.0-0-ga698c8995f-prebuilt.qemu.org 04/01/2014\n| Call Trace:\n| <IRQ>\n| dump_stack_lvl+0x7e/0xc0\n| dump_stack+0x1d/0x30\n| __might_resched+0x1a2/0x270\n| rt_spin_lock+0x68/0x170\n| kcsan_skip_report_debugfs+0x43/0xe0\n| print_report+0xb5/0x590\n| kcsan_report_known_origin+0x1b1/0x1d0\n| kcsan_setup_watchpoint+0x348/0x650\n| __tsan_unaligned_write1+0x16d/0x1d0\n| hrtimer_interrupt+0x3d6/0x430\n| __sysvec_apic_timer_interrupt+0xe8/0x3a0\n| sysvec_apic_timer_interrupt+0x97/0xc0\n| </IRQ>\n\nOn a detected data race, KCSAN's reporting logic checks if it should\nfilter the report. That list is protected by the report_filterlist_lock\n*non-raw* spinlock which may sleep on RT kernels.\n\nSince KCSAN may report data races in any context, convert it to a\nraw_spinlock.\n\nThis requires being careful about when to allocate memory for the filter\nlist itself which can be done via KCSAN's debugfs interface. Concurrent\nmodification of the filter list via debugfs should be rare: the chosen\nstrategy is to optimistically pre-allocate memory before the critical\nsection and discard if unused."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: kcsan: Convertir report_filterlist_lock en un raw_spinlock Ran Xiaokai informa que con un kernel PREEMPT_RT habilitado para KCSAN, podemos ver s\u00edmbolos como: | ERROR: funci\u00f3n inactiva llamada desde un contexto no v\u00e1lido en kernel/locking/spinlock_rt.c:48 | in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 0, name: swapper/1 | preempt_count: 10002, esperado: 0 | Profundidad de anidaci\u00f3n de RCU: 0, esperado: 0 | no hay bloqueos mantenidos por swapper/1/0. | Marca de evento irq: 156674 | hardirqs habilitados por \u00faltima vez en (156673): [] do_idle+0x1f9/0x240 | hardirqs se deshabilit\u00f3 por \u00faltima vez en (156674): [] sysvec_apic_timer_interrupt+0x14/0xc0 | softirqs se habilita por \u00faltima vez en (0): [] copy_process+0xfc7/0x4b60 | softirqs se deshabilit\u00f3 por \u00faltima vez en (0): [&lt;000000000000000&gt;] 0x0 | Preempci\u00f3n deshabilitada en: | [] paint_ptr+0x2a/0x90 | CPU: 1 UID: 0 PID: 0 Comm: swapper/1 No contaminado 6.11.0+ #3 | Nombre del hardware: PC est\u00e1ndar QEMU (i440FX + PIIX, 1996), BIOS rel-1.12.0-0-ga698c8995f-prebuilt.qemu.org 01/04/2014 | Seguimiento de llamadas: | | dump_stack_lvl+0x7e/0xc0 | dump_stack+0x1d/0x30 | __might_resched+0x1a2/0x270 | rt_spin_lock+0x68/0x170 | kcsan_skip_report_debugfs+0x43/0xe0 | print_report+0xb5/0x590 | kcsan_report_known_origin+0x1b1/0x1d0 | kcsan_setup_watchpoint+0x348/0x650 | En caso de detectarse una ejecuci\u00f3n de datos, la l\u00f3gica de informes de KCSAN comprueba si debe filtrar el informe. Esa lista est\u00e1 protegida por el spinlock report_filterlist_lock *no sin procesar* que puede estar inactivo en los n\u00facleos RT. Dado que KCSAN puede informar ejecuci\u00f3ns de datos en cualquier contexto, convi\u00e9rtalo en un spinlock sin procesar. Esto requiere tener cuidado con el momento de asignar memoria para la lista de filtros en s\u00ed, lo que se puede hacer a trav\u00e9s de la interfaz debugfs de KCSAN. La modificaci\u00f3n concurrente de la lista de filtros a trav\u00e9s de debugfs deber\u00eda ser poco frecuente: la estrategia elegida es preasignar memoria de manera optimista antes de la secci\u00f3n cr\u00edtica y descartarla si no se utiliza."}], "lastModified": "2025-10-07T19:29:16.050", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3296A0F2-DD9F-4DFD-8FFE-C9CA966F7974", "versionEndExcluding": "5.10.231", "versionStartIncluding": "5.8"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "419FD073-1517-4FD5-8158-F94BC68A1E89", "versionEndExcluding": "5.15.174", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "09AC6122-E2A4-40FE-9D33-268A1B2EC265", "versionEndExcluding": "6.1.120", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "29A976AD-B9AB-4A95-9F08-7669F8847EB9", "versionEndExcluding": "6.6.66", "versionStartIncluding": "6.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9501D045-7A94-42CA-8B03-821BE94A65B7", "versionEndExcluding": "6.12.5", "versionStartIncluding": "6.7"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}