{"api_version":"1","generated_at":"2026-05-13T11:15:24+00:00","cve":"CVE-2026-43129","urls":{"html":"https://cve.report/CVE-2026-43129","api":"https://cve.report/api/cve/CVE-2026-43129.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-43129","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-43129"},"summary":{"title":"ima: verify the previous kernel's IMA buffer lies in addressable RAM","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nima: verify the previous kernel's IMA buffer lies in addressable RAM\n\nPatch series \"Address page fault in ima_restore_measurement_list()\", v3.\n\nWhen the second-stage kernel is booted via kexec with a limiting command\nline such as \"mem=<size>\" we observe a pafe fault that happens.\n\n    BUG: unable to handle page fault for address: ffff97793ff47000\n    RIP: ima_restore_measurement_list+0xdc/0x45a\n    #PF: error_code(0x0000)  not-present page\n\nThis happens on x86_64 only, as this is already fixed in aarch64 in\ncommit: cbf9c4b9617b (\"of: check previous kernel's ima-kexec-buffer\nagainst memory bounds\")\n\n\nThis patch (of 3):\n\nWhen the second-stage kernel is booted with a limiting command line (e.g. \n\"mem=<size>\"), the IMA measurement buffer handed over from the previous\nkernel may fall outside the addressable RAM of the new kernel.  Accessing\nsuch a buffer can fault during early restore.\n\nIntroduce a small generic helper, ima_validate_range(), which verifies\nthat a physical [start, end] range for the previous-kernel IMA buffer lies\nwithin addressable memory:\n\t- On x86, use pfn_range_is_mapped().\n\t- On OF based architectures, use page_is_ram().","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-06 12:16:29","updated_at":"2026-05-11 13:08:54"},"problem_types":["NVD-CWE-noinfo"],"metrics":[{"version":"3.1","source":"nvd@nist.gov","type":"Primary","score":"5.5","severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}}],"references":[{"url":"https://git.kernel.org/stable/c/f11d7d088f5ed54b31c6735854c12845eb60eb4a","name":"https://git.kernel.org/stable/c/f11d7d088f5ed54b31c6735854c12845eb60eb4a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/10d1c75ed4382a8e79874379caa2ead8952734f9","name":"https://git.kernel.org/stable/c/10d1c75ed4382a8e79874379caa2ead8952734f9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5366ec7d2f793ce703c403d7fd4c25a3db365b9d","name":"https://git.kernel.org/stable/c/5366ec7d2f793ce703c403d7fd4c25a3db365b9d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9e1f51c1ad57cc76a0e8b5eb27038f8973fff4fa","name":"https://git.kernel.org/stable/c/9e1f51c1ad57cc76a0e8b5eb27038f8973fff4fa","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-43129","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43129","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b69a2afd5afce9bf6d56e349d6ab592c916e20f2 f11d7d088f5ed54b31c6735854c12845eb60eb4a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b69a2afd5afce9bf6d56e349d6ab592c916e20f2 9e1f51c1ad57cc76a0e8b5eb27038f8973fff4fa git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b69a2afd5afce9bf6d56e349d6ab592c916e20f2 5366ec7d2f793ce703c403d7fd4c25a3db365b9d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b69a2afd5afce9bf6d56e349d6ab592c916e20f2 10d1c75ed4382a8e79874379caa2ead8952734f9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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the Linux kernel, the following vulnerability has been resolved:\n\nima: verify the previous kernel's IMA buffer lies in addressable RAM\n\nPatch series \"Address page fault in ima_restore_measurement_list()\", v3.\n\nWhen the second-stage kernel is booted via kexec with a limiting command\nline such as \"mem=<size>\" we observe a pafe fault that happens.\n\n    BUG: unable to handle page fault for address: ffff97793ff47000\n    RIP: ima_restore_measurement_list+0xdc/0x45a\n    #PF: error_code(0x0000)  not-present page\n\nThis happens on x86_64 only, as this is already fixed in aarch64 in\ncommit: cbf9c4b9617b (\"of: check previous kernel's ima-kexec-buffer\nagainst memory bounds\")\n\n\nThis patch (of 3):\n\nWhen the second-stage kernel is booted with a limiting command line (e.g. \n\"mem=<size>\"), the IMA measurement buffer handed over from the previous\nkernel may fall outside the addressable RAM of the new kernel.  Accessing\nsuch a buffer can fault during early restore.\n\nIntroduce a small generic helper, ima_validate_range(), which verifies\nthat a physical [start, end] range for the previous-kernel IMA buffer lies\nwithin addressable memory:\n\t- On x86, use pfn_range_is_mapped().\n\t- On OF based architectures, use page_is_ram()."}],"providerMetadata":{"dateUpdated":"2026-05-07T17:14:21.463Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/f11d7d088f5ed54b31c6735854c12845eb60eb4a"},{"url":"https://git.kernel.org/stable/c/9e1f51c1ad57cc76a0e8b5eb27038f8973fff4fa"},{"url":"https://git.kernel.org/stable/c/5366ec7d2f793ce703c403d7fd4c25a3db365b9d"},{"url":"https://git.kernel.org/stable/c/10d1c75ed4382a8e79874379caa2ead8952734f9"}],"title":"ima: verify the previous kernel's IMA buffer lies in addressable RAM","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-43129","datePublished":"2026-05-06T11:27:18.180Z","dateReserved":"2026-05-01T14:12:55.988Z","dateUpdated":"2026-05-07T17:14:21.463Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-06 12:16:29","lastModifiedDate":"2026-05-11 13:08:54","problem_types":["NVD-CWE-noinfo"],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":3.6}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.12.77","matchCriteriaId":"08247D85-C56B-439D-A2E8-1570C7CF83AC"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"6.18.16","matchCriteriaId":"B4B8CDA9-BADF-4CF5-8B3B-702DE8EEA40B"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"6.19.6","matchCriteriaId":"373EEEDA-FAA1-4FB4-B6ED-DB4DD99DBE67"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"43129","Ordinal":"1","Title":"ima: verify the previous kernel's IMA buffer lies in addressable","CVE":"CVE-2026-43129","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"43129","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nima: verify the previous kernel's IMA buffer lies in addressable RAM\n\nPatch series \"Address page fault in ima_restore_measurement_list()\", v3.\n\nWhen the second-stage kernel is booted via kexec with a limiting command\nline such as \"mem=<size>\" we observe a pafe fault that happens.\n\n    BUG: unable to handle page fault for address: ffff97793ff47000\n    RIP: ima_restore_measurement_list+0xdc/0x45a\n    #PF: error_code(0x0000)  not-present page\n\nThis happens on x86_64 only, as this is already fixed in aarch64 in\ncommit: cbf9c4b9617b (\"of: check previous kernel's ima-kexec-buffer\nagainst memory bounds\")\n\n\nThis patch (of 3):\n\nWhen the second-stage kernel is booted with a limiting command line (e.g. \n\"mem=<size>\"), the IMA measurement buffer handed over from the previous\nkernel may fall outside the addressable RAM of the new kernel.  Accessing\nsuch a buffer can fault during early restore.\n\nIntroduce a small generic helper, ima_validate_range(), which verifies\nthat a physical [start, end] range for the previous-kernel IMA buffer lies\nwithin addressable memory:\n\t- On x86, use pfn_range_is_mapped().\n\t- On OF based architectures, use page_is_ram().","Type":"Description","Title":"ima: verify the previous kernel's IMA buffer lies in addressable"}]}}}