Vulnerability-Lookup

GHSA-M57M-J47P-5RQ9

Vulnerability from github – Published: 2026-05-06 12:30 – Updated: 2026-05-11 15:32

Details

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=", 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.

Severity ?

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-43240"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-06T12:16:44Z",
    "severity": "MODERATE"
  },
  "details": "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": "GHSA-m57m-j47p-5rq9",
  "modified": "2026-05-11T15:32:07Z",
  "published": "2026-05-06T12:30:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43240"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/22e460b6333a5f818b042ac89201f8e735556f4a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/37f18915a261afe84dab462624ed829cddb77a9b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4d7a8f5f28187e3d2958b2a134473da2665207e7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c5489d04337b47e93c0623e8145fcba3f5739efd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d4a132f121c591b60dbaf57ea91f1faf11631fbc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f8f73bf0f8a57ee9b86792456bd42079bc98c6b7"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

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

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.

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)

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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

GHSA-M57M-J47P-5RQ9

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

Tags

Sightings

Nomenclature