CVE-2026-43240 (GCVE-0-2026-43240)
Vulnerability from cvelistv5
Published
2026-05-06 11:28
Modified
2026-06-19 11:58
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: x86/kexec: add a sanity check on previous kernel's ima kexec buffer When the second-stage kernel is booted via kexec with a limiting command line such as "mem=<size>", the physical range that contains the carried over IMA measurement list may fall outside the truncated RAM leading to a kernel panic. BUG: unable to handle page fault for address: ffff97793ff47000 RIP: ima_restore_measurement_list+0xdc/0x45a #PF: error_code(0x0000) – not-present page Other architectures already validate the range with page_is_ram(), as done in commit cbf9c4b9617b ("of: check previous kernel's ima-kexec-buffer against memory bounds") do a similar check on x86. Without carrying the measurement list across kexec, the attestation would fail.
References
Impacted products
Vendor Product Version
Linux Linux Version: b69a2afd5afce9bf6d56e349d6ab592c916e20f2
Version: b69a2afd5afce9bf6d56e349d6ab592c916e20f2
Version: b69a2afd5afce9bf6d56e349d6ab592c916e20f2
Version: b69a2afd5afce9bf6d56e349d6ab592c916e20f2
Version: b69a2afd5afce9bf6d56e349d6ab592c916e20f2
Version: b69a2afd5afce9bf6d56e349d6ab592c916e20f2
Version: b69a2afd5afce9bf6d56e349d6ab592c916e20f2
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{
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      ],
      "cpeApplicability": [
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          "nodes": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/kexec: add a sanity check on previous kernel\u0027s ima kexec buffer\n\nWhen the second-stage kernel is booted via kexec with a limiting command\nline such as \"mem=\u003csize\u003e\", 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) \u2013 not-present page\n\nOther architectures already validate the range with page_is_ram(), as done\nin commit cbf9c4b9617b (\"of: check previous kernel\u0027s ima-kexec-buffer\nagainst memory bounds\") do a similar check on x86.\n\nWithout carrying the measurement list across kexec, the attestation\nwould fail."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-19T11:58:23.596Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/37f18915a261afe84dab462624ed829cddb77a9b"
        },
        {
          "url": "https://git.kernel.org/stable/c/22e460b6333a5f818b042ac89201f8e735556f4a"
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        },
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        },
        {
          "url": "https://git.kernel.org/stable/c/c5489d04337b47e93c0623e8145fcba3f5739efd"
        }
      ],
      "title": "x86/kexec: add a sanity check on previous kernel\u0027s ima kexec buffer",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43240",
    "datePublished": "2026-05-06T11:28:34.269Z",
    "dateReserved": "2026-05-01T14:12:55.995Z",
    "dateUpdated": "2026-06-19T11:58:23.596Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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