{"id":"CVE-2025-21713","summary":"powerpc/pseries/iommu: Don't unset window if it was never set","details":"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   \u003csnip\u003e\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   \u003csnip\u003e\n   --- interrupt: 3000\n\nFix this by having null check for the tbl passed to the\nspapr_tce_unset_window().","modified":"2026-05-07T04:17:28.982188Z","published":"2025-02-27T02:07:24.950Z","related":["SUSE-SU-2025:02254-1","SUSE-SU-2025:02307-1","SUSE-SU-2025:02333-1","USN-7521-2"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21713.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/17391cb2613b82f8c405570fea605af3255ff8d2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ac12372a13dab3f7a2762db240bd180de8ef1e5e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b853ff0b514c1df314246fcf94744005914b48cb"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21713.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-21713"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"f431a8cde7f102fce412546db6e62fdbde1131a7"},{"fixed":"b853ff0b514c1df314246fcf94744005914b48cb"},{"fixed":"ac12372a13dab3f7a2762db240bd180de8ef1e5e"},{"fixed":"17391cb2613b82f8c405570fea605af3255ff8d2"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-21713.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.11.0"},{"fixed":"6.12.13"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.13.2"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-21713.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}