Vulnerability-Lookup

FKIE_CVE-2026-43240

Vulnerability from fkie_nvd - Published: 2026-05-06 12:16 - Updated: 2026-05-11 14:27

Severity ?

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/22e460b6333a5f818b042ac89201f8e735556f4a	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/37f18915a261afe84dab462624ed829cddb77a9b	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/4d7a8f5f28187e3d2958b2a134473da2665207e7	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c5489d04337b47e93c0623e8145fcba3f5739efd	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d4a132f121c591b60dbaf57ea91f1faf11631fbc	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f8f73bf0f8a57ee9b86792456bd42079bc98c6b7	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*

JSON

To clipboard

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
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  "cveTags": [],
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      "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."
    }
  ],
  "id": "CVE-2026-43240",
  "lastModified": "2026-05-11T14:27:36.347",
  "metrics": {
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      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  "published": "2026-05-06T12:16:44.330",
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  "vulnStatus": "Analyzed",
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      "type": "Primary"
    }
  ]
}

CVE-2026-43240 (GCVE-0-2026-43240)

Vulnerability from cvelistv5 – Published: 2026-05-06 11:28 – Updated: 2026-05-11 22:20

Title

x86/kexec: add a sanity check on previous kernel's ima kexec buffer

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

6 references

URL	Tags
https://git.kernel.org/stable/c/37f18915a261afe84…
https://git.kernel.org/stable/c/22e460b6333a5f818…
https://git.kernel.org/stable/c/f8f73bf0f8a57ee9b…
https://git.kernel.org/stable/c/d4a132f121c591b60…
https://git.kernel.org/stable/c/4d7a8f5f28187e3d2…
https://git.kernel.org/stable/c/c5489d04337b47e93…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: b69a2afd5afce9bf6d56e349d6ab592c916e20f2 , < 37f18915a261afe84dab462624ed829cddb77a9b (git) Affected: b69a2afd5afce9bf6d56e349d6ab592c916e20f2 , < 22e460b6333a5f818b042ac89201f8e735556f4a (git) Affected: b69a2afd5afce9bf6d56e349d6ab592c916e20f2 , < f8f73bf0f8a57ee9b86792456bd42079bc98c6b7 (git) Affected: b69a2afd5afce9bf6d56e349d6ab592c916e20f2 , < d4a132f121c591b60dbaf57ea91f1faf11631fbc (git) Affected: b69a2afd5afce9bf6d56e349d6ab592c916e20f2 , < 4d7a8f5f28187e3d2958b2a134473da2665207e7 (git) Affected: b69a2afd5afce9bf6d56e349d6ab592c916e20f2 , < c5489d04337b47e93c0623e8145fcba3f5739efd (git)
Linux	Linux	Affected: 6.0 Unaffected: 0 , < 6.0 (semver) Unaffected: 6.1.165 , ≤ 6.1.* (semver) Unaffected: 6.6.128 , ≤ 6.6.* (semver) Unaffected: 6.12.75 , ≤ 6.12.* (semver) Unaffected: 6.18.16 , ≤ 6.18.* (semver) Unaffected: 6.19.6 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2026-43240

CVE-2026-43240 (GCVE-0-2026-43240)

Tags

Sightings

Nomenclature