CVE-2025-21713

{"id": "CVE-2025-21713", "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": "2025-02-27T02:15:14.960", "references": [{"url": "https://git.kernel.org/stable/c/17391cb2613b82f8c405570fea605af3255ff8d2", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ac12372a13dab3f7a2762db240bd180de8ef1e5e", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b853ff0b514c1df314246fcf94744005914b48cb", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-476"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/pseries/iommu: Don't unset window if it was never set\n\nOn pSeries, when user attempts to use the same vfio container used by\ndifferent iommu group, the spapr_tce_set_window() returns -EPERM\nand the subsequent cleanup leads to the below crash.\n\n Kernel attempted to read user page (308) - exploit attempt?\n BUG: Kernel NULL pointer dereference on read at 0x00000308\n Faulting instruction address: 0xc0000000001ce358\n Oops: Kernel access of bad area, sig: 11 [#1]\n NIP: c0000000001ce358 LR: c0000000001ce05c CTR: c00000000005add0\n <snip>\n NIP [c0000000001ce358] spapr_tce_unset_window+0x3b8/0x510\n LR [c0000000001ce05c] spapr_tce_unset_window+0xbc/0x510\n Call Trace:\n spapr_tce_unset_window+0xbc/0x510 (unreliable)\n tce_iommu_attach_group+0x24c/0x340 [vfio_iommu_spapr_tce]\n vfio_container_attach_group+0xec/0x240 [vfio]\n vfio_group_fops_unl_ioctl+0x548/0xb00 [vfio]\n sys_ioctl+0x754/0x1580\n system_call_exception+0x13c/0x330\n system_call_vectored_common+0x15c/0x2ec\n <snip>\n --- interrupt: 3000\n\nFix this by having null check for the tbl passed to the\nspapr_tce_unset_window()."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: powerpc/pseries/iommu: No anule la configuraci\u00f3n de la ventana si nunca se configur\u00f3 En pSeries, cuando el usuario intenta utilizar el mismo contenedor vfio utilizado por un grupo iommu diferente, spapr_tce_set_window() devuelve -EPERM y la limpieza posterior conduce al siguiente bloqueo. El kernel intent\u00f3 leer la p\u00e1gina del usuario (308) - exploit attempt? BUG: Kernel NULL pointer dereference on read at 0x00000308 Faulting instruction address: 0xc0000000001ce358 Oops: Kernel access of bad area, sig: 11 [#1] NIP: c0000000001ce358 LR: c0000000001ce05c CTR: c00000000005add0 NIP [c0000000001ce358] spapr_tce_unset_window+0x3b8/0x510 LR [c0000000001ce05c] spapr_tce_unset_window+0xbc/0x510 Call Trace: spapr_tce_unset_window+0xbc/0x510 (unreliable) tce_iommu_attach_group+0x24c/0x340 [vfio_iommu_spapr_tce] vfio_container_attach_group+0xec/0x240 [vfio] vfio_group_fops_unl_ioctl+0x548/0xb00 [vfio] sys_ioctl+0x754/0x1580 system_call_exception+0x13c/0x330 system_call_vectored_common+0x15c/0x2ec --- interrupt: 3000 Solucione esto haciendo que la verificaci\u00f3n de valores nulos sea para la tabla pasada a spapr_tce_unset_window()."}], "lastModified": "2025-03-07T12:30:28.963", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2C65B261-0C55-4563-835E-FD44483D02B3", "versionEndExcluding": "6.12.13", "versionStartIncluding": "6.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6D4116B1-1BFD-4F23-BA84-169CC05FC5A3", "versionEndExcluding": "6.13.2", "versionStartIncluding": "6.13"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}