CVE-2026-43240
Full vulnerability record from the local CVENow database.
Description
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
MEDIUM
CVSS score
5.5
(v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-05-06 12:16:44.330000
Last modified
2026-11-06 16:18:29.070000
View original CVE JSON
{
"id": "CVE-2026-43240",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-05-06T12:16:44.330",
"lastModified": "2026-11-06T16:18:29.070",
"vulnStatus": "Modified",
"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'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."
}
],
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"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
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"id": "CVE-2026-43240",
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"weaknesses": [
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"source": "[email protected]",
"type": "Primary",
"description": [
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