CVE-2026-43240
MEDIUM SEVERITYCVSS Score & Metrics
Base Score
5.5 / 10
Vector String
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Vulnerability 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.
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.
Vulnerability Details
Published Date
Last Modified
CWE ID
NVD-CWE-noinfo
Source
NVD
Vendor
Linux
Product
Linux
External References
- https://git.kernel.org/stable/c/22e460b6333a5f818b042ac89201f8e735556f4a
- https://git.kernel.org/stable/c/37f18915a261afe84dab462624ed829cddb77a9b
- https://git.kernel.org/stable/c/4d7a8f5f28187e3d2958b2a134473da2665207e7
- https://git.kernel.org/stable/c/c5489d04337b47e93c0623e8145fcba3f5739efd
- https://git.kernel.org/stable/c/d4a132f121c591b60dbaf57ea91f1faf11631fbc
- https://git.kernel.org/stable/c/f8f73bf0f8a57ee9b86792456bd42079bc98c6b7
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