CVE-2026-98433

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98433", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.348Z", "datePublished": "2026-10-18T14:38:18.296Z", "dateUpdated": "2026-10-19T09:19:29.371Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:19:29.371Z"}, "descriptions": [{"lang": "en", "value": "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 \u2014 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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/powerpc/kvm/book3s_hv_uvmem.c"], "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"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/powerpc/kvm/book3s_hv_uvmem.c"], "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"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "5.10.271"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "5.15.222"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.1.189"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.6.158"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.12.112"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.18.54"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "7.2.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ed2f2ff63cb7e71204096e765c6d02c3b6974b95"}, {"url": "https://git.kernel.org/stable/c/8f3b7746874b39fc20e0363c9076c7787d4765ba"}, {"url": "https://git.kernel.org/stable/c/a933d7024359e2e566b07903d1294b84f90482ae"}, {"url": "https://git.kernel.org/stable/c/c41088b2765af1e97e7bb05f906ae1823eca0388"}, {"url": "https://git.kernel.org/stable/c/f3d4b2fc30c97cf8e6f8b880d2de9c17ecac7f5b"}, {"url": "https://git.kernel.org/stable/c/dfb84274932737e338ff5eb27f34b4c8ecb01b50"}, {"url": "https://git.kernel.org/stable/c/fcbff8008b0e08cd53b611bd0ff7e01f5b962f80"}, {"url": "https://git.kernel.org/stable/c/0a416ee20bcccddf91ca5b63696a23b9d11d73aa"}], "title": "KVM: PPC: Book3S HV: fix secure device page leak on uv_page_in() failure", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["arch/powerpc/kvm/book3s_hv_uvmem.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "ed2f2ff63cb7e71204096e765c6d02c3b6974b95", "status": "affected", "version": "ca9f4942670c37407bb109090eaf776ce2ccc54c", "versionType": "git"}, {"lessThan": "8f3b7746874b39fc20e0363c9076c7787d4765ba", "status": "affected", "version": "ca9f4942670c37407bb109090eaf776ce2ccc54c", "versionType": "git"}, {"lessThan": "a933d7024359e2e566b07903d1294b84f90482ae", "status": "affected", "version": "ca9f4942670c37407bb109090eaf776ce2ccc54c", "versionType": "git"}, {"lessThan": "c41088b2765af1e97e7bb05f906ae1823eca0388", "status": "affected", "version": "ca9f4942670c37407bb109090eaf776ce2ccc54c", "versionType": "git"}, {"lessThan": "f3d4b2fc30c97cf8e6f8b880d2de9c17ecac7f5b", "status": "affected", "version": "ca9f4942670c37407bb109090eaf776ce2ccc54c", "versionType": "git"}, {"lessThan": "dfb84274932737e338ff5eb27f34b4c8ecb01b50", "status": "affected", "version": "ca9f4942670c37407bb109090eaf776ce2ccc54c", "versionType": "git"}, {"lessThan": "fcbff8008b0e08cd53b611bd0ff7e01f5b962f80", "status": "affected", "version": "ca9f4942670c37407bb109090eaf776ce2ccc54c", "versionType": "git"}, {"lessThan": "0a416ee20bcccddf91ca5b63696a23b9d11d73aa", "status": "affected", "version": "ca9f4942670c37407bb109090eaf776ce2ccc54c", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["arch/powerpc/kvm/book3s_hv_uvmem.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.5"}, {"lessThan": "5.5", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.271", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.222", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.189", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.158", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.112", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.54", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.8", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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 \u2014 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."}], "id": "CVE-2026-98433", "lastModified": "2026-10-19T10:18:51.290", "metrics": {}, "published": "2026-10-18T15:16:53.047", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0a416ee20bcccddf91ca5b63696a23b9d11d73aa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8f3b7746874b39fc20e0363c9076c7787d4765ba"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a933d7024359e2e566b07903d1294b84f90482ae"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c41088b2765af1e97e7bb05f906ae1823eca0388"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dfb84274932737e338ff5eb27f34b4c8ecb01b50"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ed2f2ff63cb7e71204096e765c6d02c3b6974b95"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f3d4b2fc30c97cf8e6f8b880d2de9c17ecac7f5b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fcbff8008b0e08cd53b611bd0ff7e01f5b962f80"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: KVM: PPC: Book3S HV: fix secure device page leak on uv_page_in() failure", "id": "2554823", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2554823"}, "csaw": false, "cvss3": {"cvss3_base_score": "2.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L", "status": "draft"}, "cwe": "CWE-772", "details": ["A flaw was found in the Linux kernel's KVM (Kernel-based Virtual Machine) subsystem for PowerPC architectures. When handling secure virtual machines, a failure during secure memory paging fails to release allocated device memory and internal metadata. A local user can exploit this vulnerability by causing operations that trigger page-in errors, permanently consuming entries from the firmware-bounded secure memory pool. Over time, this resource exhaustion leads to a Denial of Service (DoS), rendering affected memory regions and virtual machines unusable."], "name": "CVE-2026-98433", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98433\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98433\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98433.mbox"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ca9f4942670c37407bb109090eaf776ce2ccc54c,ed2f2ff63cb7e71204096e765c6d02c3b6974b95)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ca9f4942670c37407bb109090eaf776ce2ccc54c,8f3b7746874b39fc20e0363c9076c7787d4765ba)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ca9f4942670c37407bb109090eaf776ce2ccc54c,a933d7024359e2e566b07903d1294b84f90482ae)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ca9f4942670c37407bb109090eaf776ce2ccc54c,c41088b2765af1e97e7bb05f906ae1823eca0388)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ca9f4942670c37407bb109090eaf776ce2ccc54c,f3d4b2fc30c97cf8e6f8b880d2de9c17ecac7f5b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ca9f4942670c37407bb109090eaf776ce2ccc54c,dfb84274932737e338ff5eb27f34b4c8ecb01b50)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ca9f4942670c37407bb109090eaf776ce2ccc54c,fcbff8008b0e08cd53b611bd0ff7e01f5b962f80)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ca9f4942670c37407bb109090eaf776ce2ccc54c,0a416ee20bcccddf91ca5b63696a23b9d11d73aa)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "5.5"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.5)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.271,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.222,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.189,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.158,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.112,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.54,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.8,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc4,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-10-18T15:45:13.700744+00:00", "updated": "2026-10-19T14:15:06.976207+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}