cbcvebase.
CVE-2025-21713
published 2025-02-27

CVE-2025-21713: 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…

PriorityP421medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.20%
10.5th percentile
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. 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 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 Fix this by having null check for the tbl passed to the spapr_tce_unset_window().

Affected

9 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.12.13-1 (forky)linux 6.12.13-1 (forky)
linuxlinux
linuxlinux>= f431a8cde7f102fce412546db6e62fdbde1131a7 < b853ff0b514c1df314246fcf94744005914b48cbb853ff0b514c1df314246fcf94744005914b48cb
linuxlinux>= f431a8cde7f102fce412546db6e62fdbde1131a7 < ac12372a13dab3f7a2762db240bd180de8ef1e5eac12372a13dab3f7a2762db240bd180de8ef1e5e
linuxlinux>= f431a8cde7f102fce412546db6e62fdbde1131a7 < 17391cb2613b82f8c405570fea605af3255ff8d217391cb2613b82f8c405570fea605af3255ff8d2
linuxlinux_kernel>= 0 < 6.12.13-16.12.13-1
linuxlinux_kernel>= 0 < 6.12.13-16.12.13-1
linuxlinux_kernel>= 6.11 < 6.12.136.12.13
linuxlinux_kernel>= 6.13 < 6.13.26.13.2

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5LOW
vendor_redhat5.5MEDIUM
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