CVE-2025-21713
Estado: ModificadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
powerpc/pseries/iommu: Don't unset window if it was never set
On pSeries, when user attempts to use the same vfio container used by different iommu group, the spapr_tce_set_window() returns -EPERM and the subsequent cleanup leads to the below crash.
Fix this by having null check for the tbl passed to the spapr_tce_unset_window().
Detalles técnicos trazas, registros y código del informe original
Kernel attempted to read user page (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
<snip>
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
<snip>
--- interrupt: 3000CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.21%
- Percentil entre todas las CVEs puntuadas: 10
- Fecha de la puntuación: 5/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
CWE
- CWE-476
- CWE-476
Referencias
JSON original (NVD)
Mostrar
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"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()."
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: powerpc/pseries/iommu: No anule la configuración de la ventana si nunca se configuró 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 intentó leer la página 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 verificación de valores nulos sea para la tabla pasada a spapr_tce_unset_window()."
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"lastModified": "2026-06-17T08:44:05.563",
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