{"id":"CVE-2026-98433","revision":"e88f0918cacd42b991345656c8a2967f","records":[{"revision":"e88f0918cacd42b991345656c8a2967f","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-98433","aliases":[],"title":"KVM: PPC: Book3S HV: fix secure device page leak on uv_page_in() failure","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: PPC: Book3S HV: fix secure device page leak on uv_page_in() failure\n\nIn kvmppc_svm_page_in(), if uv_page_in() fails after\nkvmppc_uvmem_get_page() has succeeded, the secure device page is never\nreleased.  kvmppc_uvmem_get_page() sets a bit in kvmppc_uvmem_bitmap,\nallocates a kvmppc_uvmem_page_pvt struct, marks the GFN as\nKVMPPC_GFN_UVMEM_PFN, and calls zone_device_page_init() which sets\nrefcount=1 and locks the page.  The subsequent goto out_finalize skips\nthe *mig.dst assignment, so migrate_vma_finalize() is a no-op for the\npage, and none of those resources are ever reclaimed.\n\nEach occurrence permanently consumes one entry from the firmware-bounded\nsecure memory pool (kvmppc_uvmem_bitmap), leaks pvt, and leaves the GFN\nmarked as secure — making it unusable for the lifetime of the VM.\n\nThe twin __kvmppc_svm_page_out() already handles the analogous uv_page_out()\nfailure correctly with unlock_page(dpage); __free_page(dpage).  Apply\nthe same pattern here: unlock_page() followed by put_page(), which\nchains through free_zone_device_folio() into kvmppc_uvmem_folio_free()\nto clear the bitmap bit, free pvt, and reset the GFN state.\n\nReachable whenever uv_page_in() returns an error (e.g. UV pool\nexhaustion) on any POWER9/10 + Ultravisor/PEF system.","state":0,"publishedAt":"2026-10-18T14:38:18.296+00:00","modifiedAt":"2026-10-19T09:19:29.371+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"arch/powerpc/kvm/book3s_hv_uvmem.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"ca9f4942670c37407bb109090eaf776ce2ccc54c\",\n                            \"lessThan\": \"ed2f2ff63cb7e71204096e765c6d02c3b6974b95\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ca9f4942670c37407bb109090eaf776ce2ccc54c\",\n                            \"lessThan\": \"8f3b7746874b39fc20e0363c9076c7787d4765ba\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ca9f4942670c37407bb109090eaf776ce2ccc54c\",\n                            \"lessThan\": \"a933d7024359e2e566b07903d1294b84f90482ae\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ca9f4942670c37407bb109090eaf776ce2ccc54c\",\n                            \"lessThan\": \"c41088b2765af1e97e7bb05f906ae1823eca0388\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ca9f4942670c37407bb109090eaf776ce2ccc54c\",\n                            \"lessThan\": \"f3d4b2fc30c97cf8e6f8b880d2de9c17ecac7f5b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ca9f4942670c37407bb109090eaf776ce2ccc54c\",\n                            \"lessThan\": \"dfb84274932737e338ff5eb27f34b4c8ecb01b50\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ca9f4942670c37407bb109090eaf776ce2ccc54c\",\n                            \"lessThan\": \"fcbff8008b0e08cd53b611bd0ff7e01f5b962f80\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ca9f4942670c37407bb109090eaf776ce2ccc54c\",\n                            \"lessThan\": \"0a416ee20bcccddf91ca5b63696a23b9d11d73aa\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"arch/powerpc/kvm/book3s_hv_uvmem.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.5\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.5\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.271\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.222\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.189\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.158\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.112\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.54\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.8\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/ed2f2ff63cb7e71204096e765c6d02c3b6974b95","https://git.kernel.org/stable/c/8f3b7746874b39fc20e0363c9076c7787d4765ba","https://git.kernel.org/stable/c/a933d7024359e2e566b07903d1294b84f90482ae","https://git.kernel.org/stable/c/c41088b2765af1e97e7bb05f906ae1823eca0388","https://git.kernel.org/stable/c/f3d4b2fc30c97cf8e6f8b880d2de9c17ecac7f5b","https://git.kernel.org/stable/c/dfb84274932737e338ff5eb27f34b4c8ecb01b50","https://git.kernel.org/stable/c/fcbff8008b0e08cd53b611bd0ff7e01f5b962f80","https://git.kernel.org/stable/c/0a416ee20bcccddf91ca5b63696a23b9d11d73aa"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98433","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98433","identifiers":["CVE-2026-98433"]},"retained":false,"historicalAffected":[]}],"coverage":[]}