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5.5
CVSS
Medium

CVE-2025-21713

PUBLISHED

powerpc/pseries/iommu: Don't unset window if it was never set

Exploited in the wild Low complexity No user interaction
Vendor
Linux
Product
Linux
Published
Feb 27, 2025
EPSS
—

Description

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().

windows linux

CVSS scores

CVSS v3.1 5.5 Medium

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploitation status

Exploited in the wild

Recorded 2025-02-27 02:07:24 UTC · Source

SSVC decision points

Exploitation
none
Automatable
No
Technical impact
partial

References

Known exploited vulnerability sources

Catalogues that list this CVE as a known exploited vulnerability.

Source Added
CVE Feb 27, 2025

Timeline

  • CVE ID Reserved

  • CVE Published to Public

  • Added to KEVIntel