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

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Summary

CVECVE-2026-43240
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-06 12:16:44 UTC
Updated2026-06-19 13:16:29 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

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

Problem Types: NVD-CWE-noinfo

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected b69a2afd5afce9bf6d56e349d6ab592c916e20f2 37f18915a261afe84dab462624ed829cddb77a9b git Not specified
CNA Linux Linux affected b69a2afd5afce9bf6d56e349d6ab592c916e20f2 22e460b6333a5f818b042ac89201f8e735556f4a git Not specified
CNA Linux Linux affected b69a2afd5afce9bf6d56e349d6ab592c916e20f2 7e2476057950c174c7b2c2802246707bbfb497e4 git Not specified
CNA Linux Linux affected b69a2afd5afce9bf6d56e349d6ab592c916e20f2 f8f73bf0f8a57ee9b86792456bd42079bc98c6b7 git Not specified
CNA Linux Linux affected b69a2afd5afce9bf6d56e349d6ab592c916e20f2 d4a132f121c591b60dbaf57ea91f1faf11631fbc git Not specified
CNA Linux Linux affected b69a2afd5afce9bf6d56e349d6ab592c916e20f2 4d7a8f5f28187e3d2958b2a134473da2665207e7 git Not specified
CNA Linux Linux affected b69a2afd5afce9bf6d56e349d6ab592c916e20f2 c5489d04337b47e93c0623e8145fcba3f5739efd git Not specified
CNA Linux Linux affected 6.0 Not specified
CNA Linux Linux unaffected 6.0 semver Not specified
CNA Linux Linux unaffected 6.1.165 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.128 6.6.* semver Not specified
CNA Linux Linux unaffected 6.6.143 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.75 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.16 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.6 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/7e2476057950c174c7b2c2802246707bbfb497e4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4d7a8f5f28187e3d2958b2a134473da2665207e7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/d4a132f121c591b60dbaf57ea91f1faf11631fbc 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/22e460b6333a5f818b042ac89201f8e735556f4a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/c5489d04337b47e93c0623e8145fcba3f5739efd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/f8f73bf0f8a57ee9b86792456bd42079bc98c6b7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/37f18915a261afe84dab462624ed829cddb77a9b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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