Medium 5.5Published May 6, 2026

CVE-2026-43240x86/kexec: add a sanity check on previous kernel's ima kexec buffer

Updated under an hour ago (Oct 27, 2026, 7:30 PM ET)

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Exploited in the last 30 days

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.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Jun 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from b69a2afd5afce9bf6d56e349d6ab592c916e20f2 before 37f18915a261afe84dab462624ed829cddb77a9b; from b69a2afd5afce9bf6d56e349d6ab592c916e20f2 before 22e460b6333a5f818b042ac89201f8e735556f4a; from b69a2afd5afce9bf6d56e349d6ab592c916e20f2 before 7e2476057950c174c7b2c2802246707bbfb497e4; from b69a2afd5afce9bf6d56e349d6ab592c916e20f2 before f8f73bf0f8a57ee9b86792456bd42079bc98c6b7; from b69a2afd5afce9bf6d56e349d6ab592c916e20f2 before d4a132f121c591b60dbaf57ea91f1faf11631fbc; from b69a2afd5afce9bf6d56e349d6ab592c916e20f2 before 4d7a8f5f28187e3d2958b2a134473da2665207e7; from b69a2afd5afce9bf6d56e349d6ab592c916e20f2 before c5489d04337b47e93c0623e8145fcba3f5739efd	CNA record
linux linux_kernel linux:linux_kernel	from 6.0 before 6.1.165; from 6.2 before 6.6.128; from 6.7 before 6.12.75; from 6.13 before 6.18.16; from 6.19 before 6.19.6	NVD

References

References

https://git.kernel.org/stable/c/37f18915a261afe84dab462624ed829cddb77a9b	patch
https://git.kernel.org/stable/c/22e460b6333a5f818b042ac89201f8e735556f4a	patch
https://git.kernel.org/stable/c/7e2476057950c174c7b2c2802246707bbfb497e4
https://git.kernel.org/stable/c/f8f73bf0f8a57ee9b86792456bd42079bc98c6b7	patch
https://git.kernel.org/stable/c/d4a132f121c591b60dbaf57ea91f1faf11631fbc	patch
https://git.kernel.org/stable/c/4d7a8f5f28187e3d2958b2a134473da2665207e7	patch
https://git.kernel.org/stable/c/c5489d04337b47e93c0623e8145fcba3f5739efd	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.