{"schema":"threatline.record/2","record":{"id":"CVE-2026-98433","aliases":[],"summary":"KVM: PPC: Book3S HV: fix secure device page leak on uv_page_in() failure","details":"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.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98433","source_modified_at":"2026-10-19T09:19:29.371Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"ca9f4942670c37407bb109090eaf776ce2ccc54c","lessThan":"ed2f2ff63cb7e71204096e765c6d02c3b6974b95","status":"affected","versionType":"git"},{"version":"ca9f4942670c37407bb109090eaf776ce2ccc54c","lessThan":"8f3b7746874b39fc20e0363c9076c7787d4765ba","status":"affected","versionType":"git"},{"version":"ca9f4942670c37407bb109090eaf776ce2ccc54c","lessThan":"a933d7024359e2e566b07903d1294b84f90482ae","status":"affected","versionType":"git"},{"version":"ca9f4942670c37407bb109090eaf776ce2ccc54c","lessThan":"c41088b2765af1e97e7bb05f906ae1823eca0388","status":"affected","versionType":"git"},{"version":"ca9f4942670c37407bb109090eaf776ce2ccc54c","lessThan":"f3d4b2fc30c97cf8e6f8b880d2de9c17ecac7f5b","status":"affected","versionType":"git"},{"version":"ca9f4942670c37407bb109090eaf776ce2ccc54c","lessThan":"dfb84274932737e338ff5eb27f34b4c8ecb01b50","status":"affected","versionType":"git"},{"version":"ca9f4942670c37407bb109090eaf776ce2ccc54c","lessThan":"fcbff8008b0e08cd53b611bd0ff7e01f5b962f80","status":"affected","versionType":"git"},{"version":"ca9f4942670c37407bb109090eaf776ce2ccc54c","lessThan":"0a416ee20bcccddf91ca5b63696a23b9d11d73aa","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98433","source_modified_at":"2026-10-19T09:19:29.371Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"5.5","status":"affected"},{"version":"0","lessThan":"5.5","status":"unaffected","versionType":"semver"},{"version":"5.10.271","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.222","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.189","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.158","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.112","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.54","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.8","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98433","source_modified_at":"2026-10-19T09:19:29.371Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"8f3b7746874b39fc20e0363c9076c7787d4765ba","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98433","source_modified_at":"2026-10-19T09:19:29.371Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"0a416ee20bcccddf91ca5b63696a23b9d11d73aa","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00164,"percentile":0.05359,"score_date":"2026-10-23"},"published_at":"2026-10-18T14:38:18.296Z","modified_at":"2026-10-19T09:19:29.371Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98433","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:19:29.371Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98433","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/ed2f2ff63cb7e71204096e765c6d02c3b6974b95"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/8f3b7746874b39fc20e0363c9076c7787d4765ba"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/a933d7024359e2e566b07903d1294b84f90482ae"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/c41088b2765af1e97e7bb05f906ae1823eca0388"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/f3d4b2fc30c97cf8e6f8b880d2de9c17ecac7f5b"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/dfb84274932737e338ff5eb27f34b4c8ecb01b50"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/fcbff8008b0e08cd53b611bd0ff7e01f5b962f80"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/0a416ee20bcccddf91ca5b63696a23b9d11d73aa"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-19T09:19:29.371Z","content_hash":"994c9fbb0467a157692687c89415f40d435c746a4c6e23e3175f13250e195512"}}