{"api_version":"1","generated_at":"2026-06-24T17:30:04+00:00","cve":"CVE-2026-43240","urls":{"html":"https://cve.report/CVE-2026-43240","api":"https://cve.report/api/cve/CVE-2026-43240.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-43240","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-43240"},"summary":{"title":"x86/kexec: add a sanity check on previous kernel's ima kexec buffer","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nx86/kexec: add a sanity check on previous kernel's ima kexec buffer\n\nWhen the second-stage kernel is booted via kexec with a limiting command\nline such as \"mem=<size>\", the physical range that contains the carried\nover IMA measurement list may fall outside the truncated RAM leading to a\nkernel panic.\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\nOther architectures already validate the range with page_is_ram(), as done\nin commit cbf9c4b9617b (\"of: check previous kernel's ima-kexec-buffer\nagainst memory bounds\") do a similar check on x86.\n\nWithout carrying the measurement list across kexec, the attestation\nwould fail.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-06 12:16:44","updated_at":"2026-06-19 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add a sanity check on previous kernel's ima kexec buf","CVE":"CVE-2026-43240","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"43240","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nx86/kexec: add a sanity check on previous kernel's ima kexec buffer\n\nWhen the second-stage kernel is booted via kexec with a limiting command\nline such as \"mem=<size>\", the physical range that contains the carried\nover IMA measurement list may fall outside the truncated RAM leading to a\nkernel panic.\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\nOther architectures already validate the range with page_is_ram(), as done\nin commit cbf9c4b9617b (\"of: check previous kernel's ima-kexec-buffer\nagainst memory bounds\") do a similar check on x86.\n\nWithout carrying the measurement list across kexec, the attestation\nwould fail.","Type":"Description","Title":"x86/kexec: add a sanity check on previous kernel's ima kexec buf"}]}}}